KovalevskiiA. A. “On the Convergence of Functions from a Sobolev Space Satisfying Special Integral Estimates”. Ukrains’kyi Matematychnyi Zhurnal 58, no. 2 (February 25, 2006): 168–183. Accessed November 22, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/3445.