SUBRAMANYAM, S. S. On Permutable Quadratic Involutions. The Journal of the Indian Mathematical Society, [S. l.], v. 27, n. 3-4, p. 167–183, 1963. DOI: 10.18311/jims/1963/16870. Disponível em: http://www.informaticsjournals.com/index.php/jims/article/view/16870. Acesso em: 19 may. 2024.