MARDANOV , I. Dzh. Construction of integral variety of solutions of a system of difference equations . Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 44, n. 5, p. 709–712, 1992. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/7970. Acesso em: 6 dec. 2025.