1.
Belopol’skaya YI. A priori estimates for solutions of the first initial boundary-value problem for systems of fully nonlinear partial differential equations. Ukr. Mat. Zhurn. [Internet]. 1997 Mar. 25 [cited 2025 Dec. 5];49(3):338–363. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/5012