AAS, Hans-fredrick. Congruences for the Coefficients of the Modular Invariant $j(\tau)$. MATHEMATICA SCANDINAVICA, [S. l.], v. 15, p. 64–68, 1964. DOI: 10.7146/math.scand.a-10727. Disponível em: https://tidsskrift.dk/math/article/view/10727. Acesso em: 14 aug. 2026.