PLAKHTA, L. P. Restrictions on free actions of the alternating group $A_6$ on products of spheres. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 48, n. 10, p. 1431–1434, 1996. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5229. Acesso em: 5 dec. 2025.