[1]
V. A. Chernetskii, “Unimprovable estimates for solutions of a mixed problem for linear elliptic equations of the second order in a neighborhood of an angular point”,
Ukr. Mat. Zhurn., vol. 49, no. 11, pp. 1529–1542, Nov. 1997, Accessed: Apr. 09, 2025. [Online]. Available:
https://umj.imath.kiev.ua/index.php/umj/article/view/5152