2Anna Sfard,Liora Linchevski.The gains and the pitfalls of reification — The case of algebra[J].Educational Studies in Mathematics (-).1994(2-3)
3Anna Sfard.On the dual nature of mathematical conceptions: Reflections on processes and objects as different sides of the same coin[J].Educational Studies in Mathematics.1991(1)
4Sfard A.On the dual nature of mathematical conceptions: Reflections on processes and objects as different sides of the same coin[].Educational Studies.1991
5A. Sfard,L. Linchevski.The gains and the pitfalls of reification—the case of algebra[].Educational Studies.1994
