SMIRNOV, Sergey. Nonlocal Third Order Boundary Value Problems with Solutions that Change Sign. Mathematical Modelling and Analysis, [S. l.], v. 19, n. 2, p. 145–154, 2014. DOI: 10.3846/13926292.2014.908792. Disponível em: https://journals.vilniustech.lt/index.php/MMA/article/view/3276. Acesso em: 13 jul. 2025.