BOBODZHANOV, A.A.; KALIMBETOV, B.T.; SAFONOV, V.F. Singularly perturbed control problems in the case of the stability of the spectrum of the matrix of an optimal system. Bulletin of the Karaganda University. Mathematics Series, [S. l.], v. 96, n. 4, p. 22–38, 2019. DOI: 10.31489/2019m4/22-38. Disponível em: http://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/287. Acesso em: 4 sep. 2025.