AHMADI, Parviz; HASANI, Masoud. A NOTE ON EXTRINSIC FRAME HOMOGENEITY OF HYPERQUADRICS. Italian Journal of Pure and Applied Mathematics, [S. l.], v. 37, p. 473–476, 2017. Disponível em: https://journals.uniurb.it/index.php/ijpam/article/view/6685. Acesso em: 16 sep. 2026.