Bourbaki, N. (1998) [1970], "§8.1 Rings", Algebra I: Chapters 1–3, Springer, p. 97, ISBN 978-3-540-64243-5 978-3-540-64243-5 ↩
"MathOverflow: The Origin(s) of Modular and Moduli". Retrieved 8 March 2024. https://mathoverflow.net/questions/300013/the-origins-of-modular-and-moduli/300076#300076 ↩