BUKANAY, N.U.; MIRZAKULOVA, A.E.; DAUYLBAYEV, M.K.; KONISBAYEVA , K.T. A boundary jumps phenomenon in the integral boundary value problem for singularly perturbed differential equations. Bulletin of the Karaganda University. Mathematics Series, [S. l.], v. 98, n. 2, p. 46–58, 2020. DOI: 10.31489/2020m2/46-58. Disponível em: https://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/357. Acesso em: 25 aug. 2025.