1.
Yevstafyeva VV. Periodic solutions of a system of differential equations with hysteresis nonlinearity in the presence of eigenvalue zero. Ukr. Mat. Zhurn. [Internet]. 2018Aug.25 [cited 2024Apr.19];70(8):1085-96. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/1619