![134011](https://sdvigpress.org/images/creator/_default.jpg)
References
William McCallum
with Cuoco, A. (2018). The double continuity of algebra. In G. Kaiser, H. Forgasz, M. Graven, A. Kuzniak, E. Simmt, & B. Xu (Eds.). Invited lectures from the 13th international congress on mathematical education (pp. 49-63). Dordrecht: Springer.