AISAGALIEV, S. A.; KALIMOLDAYEV, M. N.; POZDEEVA, E. M. On the boundary problem of ordinary differential equations. Journal of Mathematics, Mechanics and Computer Science, [S. l.], v. 75, n. 4, p. 4–21, 2012. Disponível em: https://bm.kaznu.kz/index.php/kaznu/article/view/154. Acesso em: 3 jul. 2024.