BOIJ, M. Gorenstein algebras with nonunimodal Betti numbers. MATHEMATICA SCANDINAVICA, [S. l.], v. 84, n. 2, p. 161–164, 1999. DOI: 10.7146/math.scand.a-13871. Disponível em: https://www.mscand.dk/article/view/13871. Acesso em: 2 may. 2024.