References
Kenneth Ruthven
(2000-2009)
X(2005)., Towards a normal science of mathematics education?, in M. H. G. . Hoffmann, J. Lenhard & F. Seeger (eds.), Activity and sign, Dordrecht, Springer, pp. 153-158.
(2000-2009)
X(2005)., Towards a normal science of mathematics education?, in M. H. G. . Hoffmann, J. Lenhard & F. Seeger (eds.), Activity and sign, Dordrecht, Springer, pp. 153-158.