EFENDIEV, V. V.; ZHELTIKOV, V. P. Averaging of boundary-value problems of control over a standard system with delay. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 48, n. 4, p. 548–553, 1996. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5319. Acesso em: 5 dec. 2025.