KURBANSHOEV , S. Z. On analytical solutions for sets of functional equations. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 43, n. 2, p. 151–154, 2025. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/9348. Acesso em: 6 dec. 2025.