Kurta , V. V. “Behaviour of Solutions of Quasilinear Elliptical Equations of the Second Order in Nonrestricted Regions”. Ukrains’kyi Matematychnyi Zhurnal 44, no. 2 (February 28, 1992): 279–283. Accessed December 6, 2025. https://umj.imath.kiev.ua/index.php/umj/article/view/7843.