Boundary-value problem for a system of linear nonhomogeneous first order differential equations with rectangular matrices. Neliniini Kolyvannya, [S. l.], v. 19, n. 4, p. 476–492, 2016. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/843. Acesso em: 8 dec. 2025.