Perestyuk NA, Slyusarchuk VY. Periodic solutions of nonlinear differential equations with pulse influence in a banach space. Ukr. Mat. Zhurn. [Internet]. 1995Mar.25 [cited 2024Jul.27];47(3):370–380. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/5426