Zelinskii YB, Klishchuk BA, Tkachuk MV. Theorems on Inclusion for Multivalued Mappings. Ukr. Mat. Zhurn. [Internet]. 2014Jul.25 [cited 2024Nov.24];66(7):1003–1005. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/2194