Mikhailets, V.A. and Murach, A.A. (2013) “Extended Sobolev Scale and Elliptic Operators”, Ukrains’kyi Matematychnyi Zhurnal, 65(3), pp. 392–404. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/2426 (Accessed: 5 December 2025).