Sevost’yanov, E. A. “On the Equicontinuity of Mappings With Branching in the Closure of the Domain”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 69, no. 2, Feb. 2017, pp. 273-9, https://umj.imath.kiev.ua/index.php/umj/article/view/1693.