PUTHENPURAKAL, T. J. . Invariants of linkage of modules. MATHEMATICA SCANDINAVICA, [S. l.], v. 127, n. 2, p. 223–242, 2021. DOI: 10.7146/math.scand.a-125992. Disponível em: https://www.mscand.dk/article/view/125992. Acesso em: 19 sep. 2021.