GRITSANS, Armands; SADYRBAEV, Felix. On solvability of boundary value problem for asymmetric differential equation depending on x ′. Mathematical Modelling and Analysis, [S. l.], v. 18, n. 2, p. 176–190, 2013. DOI: 10.3846/13926292.2013.779943. Disponível em: https://journals.vilniustech.lt/index.php/MMA/article/view/4106. Acesso em: 9 may. 2025.