KovalevskiiA. A. “On the Convergence of Certain Numerical Characteristics of Variational Dirichlet Problems in Variable Domains”. Ukrains’kyi Matematychnyi Zhurnal 52, no. 11 (November 25, 2000): 1497-1512. Accessed December 12, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/4556.