GUO, P.; ZHANG, Xirong. On minimal non- MSP -groups. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 63, n. 9, p. 1279–1278, 2011. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2804. Acesso em: 27 apr. 2025.