Sfard, A. (2003). Balancing the unbalanceable: The NCTM Standards in light of theories of learning mathematics. In J. Kilpatrick, W. G. Martin, & D. Schifter (Eds.), A research companion to Principals and Standards for School Mathematics (pp. 353–392). Reston, VA: NCTM.
Sfard, A. (2000). On reform movement and the limits of mathematical discourse. Mathematical Thinking and Learning, 2(3), 157–189.
Sfard, A. (1998). The many faces of mathematics: Do mathematicians and researchers in mathematics education speak about the same thing? In A. Sierpinska & J. Kilpatrick (Eds.), Mathematics Education as a Research Domain: A Search for Identity (Vol. 2, pp. 491–511). Dordrecht, The Netherlands: Kluwer.
Sfard, A., & Linchevski, L. (1994). The gains and the pitfalls of reification? The case of algebra. Educational Studies in Mathematics, 26(26), 191–228. doi:10.1007/BF01273663