SYAVAVKO, M. S. Generalization of the Cramer Formula. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 53, n. 5, p. 662–679, 2001. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4288. Acesso em: 5 dec. 2025.