M. L. Gorbachuk and V. M. Gorbachuk, “On behavior at infinity of solutions of elliptic differential equations in a Banach space”, MFAT, vol. 23, no. 2, pp. 108–122, Jun. 2017, Accessed: Dec. 13, 2025. [Online]. Available: https://zen.imath.kiev.ua/index.php/mfat/article/view/657