KONISBAYEVA, K. T.; DAUYLBAYEV, M. K.; TORTBAY, N. R. INTEGRAL BVP FOR SINGULARLY PERTURBED SYSTEM OF DIFFERENTIAL EQUATIONS. International Journal of Mathematics and Physics, [S. l.], v. 12, n. 1, p. 25–33, 2021. DOI: 10.26577/ijmph.2021.v12.i1.04. Disponível em: https://ijmph.kaznu.kz/index.php/kaznu/article/view/371. Acesso em: 29 apr. 2024.