Ryazanov, V. I., R. R. Salimov, and E. A. Sevost’yanov. 2016. “Normality of the Orlicz - Sobolev Classes”. Ukrains’kyi Matematychnyi Zhurnal 68 (1), 106-16. https://umj.imath.kiev.ua/index.php/umj/article/view/1825.