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...mer|Kraemer, J.-M.]], & [[Irene van Stiphout|Stiphout, I. van]]. (2016). [[Gravemeijer, Bruin-Muurling, Kraemer, & van Stiphout (2016)|Shortcomings of mathematics ..., R.]], & [[Koeno Gravemeijer|Gravemeijer, K.]] (2014). [[Palha, Dekker, & Gravemeijer (2014)|The effect of shift-problem lessons in the mathematics classroom]].