عکس مستوی قضیه خارجیه نزد خونجی. جاویدان خرد, [S. l.], v. 9, n. 21, p. 109–108, 1401. Disponível em: https://journalsirip.com/index.php/javidankherad/article/view/868.. Acesso em: 5 apr. 2025.