DVORNYK, A. V.; TKACHENKO, V. I. Frequency locking of periodic solutions to differential equations with impulsive perturbations. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 74, n. 7, p. 939–960, 2022. DOI: 10.37863/umzh.v74i7.7138. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/7138. Acesso em: 5 dec. 2025.