Katz, V. J.; Barton, B. (2006). “Stages in the History of Algebra with Implications for Teaching”. Educational Studies in Mathematics. 66 (2): 185–201. doi:10.1007/s10649-006-9023-7. ISSN0013-1954.
Katz, V. J.; Barton, B. (2006). “Stages in the History of Algebra with Implications for Teaching”. Educational Studies in Mathematics. 66 (2): 185–201. doi:10.1007/s10649-006-9023-7. ISSN0013-1954.