Meshkov, V. Z. “Restrictions on the Decrease Rate of Elliptical Equations Solutions in Non-Restricted Domains ”. Ukrains’kyi Matematychnyi Zhurnal 40, no. 5 (August 29, 1988): 652–654. Accessed December 6, 2025. https://umj.imath.kiev.ua/index.php/umj/article/view/8820.