LAHIRI, D. B. Identities Connecting Elementary Divisor Functions of Different Degrees, and Allied Congruences. MATHEMATICA SCANDINAVICA, [S. l.], v. 24, p. 102–110, 1969. DOI: 10.7146/math.scand.a-10923. Disponível em: https://www.mscand.dk/article/view/10923. Acesso em: 3 may. 2024.