MÜHLHERR, B.; WEISS, R. The Orthogonal Tits Quadrangles. New Zealand Journal of Mathematics, [S. l.], v. 52, p. 427–452, 2021. DOI: 10.53733/105. Disponível em: https://nzjmath.org/index.php/NZJMATH/article/view/105. Acesso em: 8 dec. 2021.