Ryazanov, V. I., R. R. Salimov, and E. A. Sevost’yanov. “On the Orlicz–Sobolev Classes and Mappings With Bounded Dirichlet Integral”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 65, no. 9, Sept. 2013, pp. 1254–1265, https://umj.imath.kiev.ua/index.php/umj/article/view/2506.