PACHPATTE, B. G. On a Nonlinear Volterra Integral Equation in Two Variables. Sarajevo Journal of Mathematics, [S. l.], v. 6, n. 1, p. 59–73, 2024. DOI: 10.5644/SJM.06.1.05. Disponível em: https://sjm.anubih.ba/index.php/sjm/article/view/326. Acesso em: 15 oct. 2024.