MYRONYK, V.I.; MYKHAYLYUK, V.V. First-order linear partial differential equations in the class of separately differentiable functions. Carpathian Mathematical Publications, [S. l.], v. 5, n. 1, p. 89–93, 2013. DOI: 10.15330/cmp.5.1.89-93. Disponível em: https://scijournals.pnu.edu.ua/index.php/cmp/article/view/3655. Acesso em: 4 may. 2024.