LAKOS, Gyula. On the $H$-ring structure of infinite Grassmannians. Methods of Functional Analysis and Topology, [S. l.], v. 16, n. 3, p. 242–258, 2010. Disponível em: https://zen.imath.kiev.ua/index.php/mfat/article/view/453. Acesso em: 17 dec. 2025.