BantsurN. R., and TrofimchukE. P. “On the Existence and Stability of Periodic and Almost Periodic Solutions of Quasilinear Equations With Maxima”. Ukrains’kyi Matematychnyi Zhurnal 50, no. 6 (June 25, 1998): 747–754. Accessed November 24, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/4884.