SURYANARAYANA, D.; RAMA CHANDRA RAO, R. On an Asymptotic Formula of Ramanujan. Mathematica Scandinavica, Berkeley, CA, United States, v. 32, p. 258–264, 1973. DOI: 10.7146/math.scand.a-11460. Disponível em: https://journals.msp.org/mscand/article/view/2149. Acesso em: 25 jul. 2026.