ANVARIYEH, S.M.; DAVVAZ, B. On the heart of hypermodules. Mathematica Scandinavica, Berkeley, CA, United States, v. 106, n. 1, p. 39–49, 2010. DOI: 10.7146/math.scand.a-15123. Disponível em: https://journals.msp.org/mscand/article/view/574. Acesso em: 24 jul. 2026.