Kapustyan, O. V., and P. O. Kasyanov. “Global Attractor for a Nonautonomous Inclusion With Discontinuous Right-Hand Side”. Ukrains’kyi Matematychnyi Zhurnal 55, no. 11 (November 25, 2003): 1467–1475. Accessed April 14, 2025. https://umj.imath.kiev.ua/index.php/umj/article/view/4017.