INVARIANTE AND REDUCTION OF THE CLASS y¢ = F(x)yn , (n ¹ 0 ),UNDER STRETCHING GROUPS. Al-Nahrain Journal of Science, [S. l.], v. 11, n. 1, p. 90–93, 2008. Disponível em: https://anjs.edu.iq/index.php/anjs/article/view/1397. Acesso em: 15 apr. 2025.