SIMON, László. On a system of nonlinear partial functional differential equations of different types. Studia Universitatis Babeș-Bolyai Mathematica, [S. l.], v. 61, n. 2, p. 177–194, 2016. Disponível em: https://studia.reviste.ubbcluj.ro/index.php/subbmathematica/article/view/5551. Acesso em: 5 feb. 2025.