O. MAKHMUDOVA. USING THE VARIABLE SUBSTITUTION METHOD WHEN SOLVING SOME FOURTHORDER EQUATIONS. Galaxy International Interdisciplinary Research Journal, [S. l.], v. 11, n. 12, p. 201–206, 2023. Disponível em: https://internationaljournals.co.in/index.php/giirj/article/view/4799. Acesso em: 25 nov. 2024.