Tiryaki, A. “Caccioppoli-Type Estimates for a Class of Nonlinear Differential Operators”. Ukrains’kyi Matematychnyi Zhurnal 70, no. 10 (October 25, 2018): 1429–1438. Accessed April 11, 2025. https://umj.imath.kiev.ua/index.php/umj/article/view/1646.