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	<id>https://mathed.net/w/index.php?action=history&amp;feed=atom&amp;title=Hans_Freudenthal</id>
	<title>Hans Freudenthal - Revision history</title>
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	<updated>2026-09-19T18:41:24Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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	<entry>
		<id>https://mathed.net/w/index.php?title=Hans_Freudenthal&amp;diff=298&amp;oldid=prev</id>
		<title>imported&gt;Raymond Johnson at 21:24, 27 October 2013</title>
		<link rel="alternate" type="text/html" href="https://mathed.net/w/index.php?title=Hans_Freudenthal&amp;diff=298&amp;oldid=prev"/>
		<updated>2013-10-27T21:24:47Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 21:24, 27 October 2013&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l1&quot;&gt;Line 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;== Publications ==&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;== Publications ==&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Hans Freudenthal|Freudenthal, H.]] (&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;1968&lt;/del&gt;). [[Freudenthal (&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;1968&lt;/del&gt;)|&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Why to teach mathematics so as to be useful&lt;/del&gt;]]. &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Educational Studies in Mathematics&lt;/del&gt;, &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;1, 3–8&lt;/del&gt;.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Hans Freudenthal|Freudenthal, H.]] (&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;1983&lt;/ins&gt;). &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&#039;&#039;&lt;/ins&gt;[[Freudenthal (&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;1983&lt;/ins&gt;)|&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Didactical phenomenology of mathematical structures&lt;/ins&gt;]]&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&#039;&#039; (p&lt;/ins&gt;. &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;595). Dordrecht&lt;/ins&gt;, &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;The Netherlands: D. Reidel&lt;/ins&gt;.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Hans Freudenthal|Freudenthal, H.]] (&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;1971&lt;/del&gt;). [[Freudenthal (&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;1971&lt;/del&gt;)|&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Geometry between the devil and the deep sea&lt;/del&gt;]]. Educational Studies in Mathematics, &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;3&lt;/del&gt;(&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;3-4&lt;/del&gt;), &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;413–435&lt;/del&gt;.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Hans Freudenthal|Freudenthal, H.]] (&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;1981&lt;/ins&gt;). [[Freudenthal (&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;1981&lt;/ins&gt;)|&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Major problems of mathematics education&lt;/ins&gt;]]. &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&#039;&#039;[[&lt;/ins&gt;Educational Studies in Mathematics&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;]]&#039;&#039;&lt;/ins&gt;, &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;12&lt;/ins&gt;(&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;2&lt;/ins&gt;), &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;133–150. doi:10&lt;/ins&gt;.&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;1007/BF00305618&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Hans Freudenthal|Freudenthal, H.]] (1973). [[Freudenthal (1973)|Mathematics as an educational task]] (p. 680). Dordrecht, The Netherlands: D. Reidel.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Hans Freudenthal|Freudenthal, H.]] (1973). &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&#039;&#039;&lt;/ins&gt;[[Freudenthal (1973)|Mathematics as an educational task]]&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&#039;&#039; &lt;/ins&gt;(p. 680). Dordrecht, The Netherlands: D. Reidel.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Hans Freudenthal|Freudenthal, H.]] (&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;1981&lt;/del&gt;). [[Freudenthal (&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;1981&lt;/del&gt;)|&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Major problems of mathematics education&lt;/del&gt;]]. Educational Studies in Mathematics, &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;12&lt;/del&gt;(&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;2&lt;/del&gt;), &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;133–150. doi:10&lt;/del&gt;.&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;1007/BF00305618&lt;/del&gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Hans Freudenthal|Freudenthal, H.]] (&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;1971&lt;/ins&gt;). [[Freudenthal (&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;1971&lt;/ins&gt;)|&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Geometry between the devil and the deep sea&lt;/ins&gt;]]. &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&#039;&#039;[[&lt;/ins&gt;Educational Studies in Mathematics&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;]]&#039;&#039;&lt;/ins&gt;, &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;3&lt;/ins&gt;(&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;3-4&lt;/ins&gt;), &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;413–435&lt;/ins&gt;.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Hans Freudenthal|Freudenthal, H.]] (&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;1983&lt;/del&gt;). [[Freudenthal (&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;1983&lt;/del&gt;)|&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Didactical phenomenology of mathematical structures&lt;/del&gt;]] &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;(p&lt;/del&gt;. &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;595). Dordrecht&lt;/del&gt;, &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;The Netherlands: D. Reidel&lt;/del&gt;.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Hans Freudenthal|Freudenthal, H.]] (&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;1968&lt;/ins&gt;). [[Freudenthal (&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;1968&lt;/ins&gt;)|&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Why to teach mathematics so as to be useful&lt;/ins&gt;]]. &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&#039;&#039;[[Educational Studies in Mathematics]]&#039;&#039;, 1&lt;/ins&gt;, &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;3–8&lt;/ins&gt;.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Category:People|Freudenthal, Hans]]&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Category:People|Freudenthal, Hans]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;[[Category:Realistic Mathematics Education]]&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>imported&gt;Raymond Johnson</name></author>
	</entry>
	<entry>
		<id>https://mathed.net/w/index.php?title=Hans_Freudenthal&amp;diff=297&amp;oldid=prev</id>
		<title>imported&gt;Raymond Johnson: Created page with &quot;== Publications ==  Freudenthal, H. (1968). Why to teach mathematics so as to be useful. Educational Studies in Mathematics, 1, 3...&quot;</title>
		<link rel="alternate" type="text/html" href="https://mathed.net/w/index.php?title=Hans_Freudenthal&amp;diff=297&amp;oldid=prev"/>
		<updated>2012-11-30T09:29:33Z</updated>

		<summary type="html">&lt;p&gt;Created page with &amp;quot;== Publications ==  &lt;a href=&quot;/wiki/Hans_Freudenthal&quot; title=&quot;Hans Freudenthal&quot;&gt;Freudenthal, H.&lt;/a&gt; (1968). &lt;a href=&quot;/w/index.php?title=Freudenthal_(1968)&amp;amp;action=edit&amp;amp;redlink=1&quot; class=&quot;new&quot; title=&quot;Freudenthal (1968) (page does not exist)&quot;&gt;Why to teach mathematics so as to be useful&lt;/a&gt;. Educational Studies in Mathematics, 1, 3...&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;== Publications ==&lt;br /&gt;
&lt;br /&gt;
[[Hans Freudenthal|Freudenthal, H.]] (1968). [[Freudenthal (1968)|Why to teach mathematics so as to be useful]]. Educational Studies in Mathematics, 1, 3–8.&lt;br /&gt;
&lt;br /&gt;
[[Hans Freudenthal|Freudenthal, H.]] (1971). [[Freudenthal (1971)|Geometry between the devil and the deep sea]]. Educational Studies in Mathematics, 3(3-4), 413–435.&lt;br /&gt;
&lt;br /&gt;
[[Hans Freudenthal|Freudenthal, H.]] (1973). [[Freudenthal (1973)|Mathematics as an educational task]] (p. 680). Dordrecht, The Netherlands: D. Reidel.&lt;br /&gt;
&lt;br /&gt;
[[Hans Freudenthal|Freudenthal, H.]] (1981). [[Freudenthal (1981)|Major problems of mathematics education]]. Educational Studies in Mathematics, 12(2), 133–150. doi:10.1007/BF00305618&lt;br /&gt;
&lt;br /&gt;
[[Hans Freudenthal|Freudenthal, H.]] (1983). [[Freudenthal (1983)|Didactical phenomenology of mathematical structures]] (p. 595). Dordrecht, The Netherlands: D. Reidel.&lt;br /&gt;
&lt;br /&gt;
[[Category:People|Freudenthal, Hans]]&lt;/div&gt;</summary>
		<author><name>imported&gt;Raymond Johnson</name></author>
	</entry>
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