RyazanovV. I. “On Convergence Theorems for Homeomorphisms of Sobolev Class”. Ukrains’kyi Matematychnyi Zhurnal 47, no. 2 (February 25, 1995): 249–259. Accessed November 24, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/5410.