KICHMARENKO, O. D. Application of the method of averaging to the problems of optimal control for ordinary differential equations on the semiaxis. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 70, n. 5, p. 642–654, 2018. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1584. Acesso em: 5 dec. 2025.