JINNAH, M. I. A note on PG-modules. MATHEMATICA SCANDINAVICA, [S. l.], v. 37, p. 27–28, 1975. DOI: 10.7146/math.scand.a-11584. Disponível em: https://www.mscand.dk/article/view/11584. Acesso em: 4 may. 2024.