AAS, Hans-fredrick. Congruences for the Coefficients of the Modular Invariant $j(\tau)$. Mathematica Scandinavica, Berkeley, CA, United States, v. 14, p. 185–192, 1964. DOI: 10.7146/math.scand.a-10717. Disponível em: https://journals.msp.org/mscand/article/view/2588. Acesso em: 25 jul. 2026.