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Cobb, P. (2000). Conducting experiments in collaboration with teacher. In A. Kelly & R. Lesh (Eds.), Handbook of research design in mathematics and science. Lawrence Erlbaum Associates.
Ernest, P. (1991). The philosophy of mathematics education. The Falmer Press.
Freudenthal, H. (1983). Didactical phenomenology of mathematical structure. D. Reidel Publishing Company.
Freudenthal, H.(1991). Revisiting mathematics education. Dordrecht: Kluwer Academic Publishers.
Gravemeijer, K. (1994a). Developing realistic mathematics education. Utrect: CD-¥â Press.