LAHIRI, D. B. Identities Connecting Elementary Divisor Functions of Different Degrees, and Allied Congruences. Mathematica Scandinavica, Berkeley, CA, United States, v. 24, p. 102–110, 1969. DOI: 10.7146/math.scand.a-10923. Disponível em: https://journals.msp.org/mscand/article/view/2376. Acesso em: 25 jul. 2026.