[1]
I. M. Velikoivanenko, I. I. Lyashko, and G. E. Mistetsky, “Solution in finite-difference stating of boundary value problems for one equation of elliptical type”, Ukr. Mat. Zhurn., vol. 23, no. 2, pp. 229–235, Feb. 1971, Accessed: Dec. 06, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/8505