Vabishchevich, Nikolay, and Petr Vabishchevich. “VAGO Method for the Solution of Elliptic second‐order Boundary Value Problems”. Mathematical Modelling and Analysis 15, no. 4 (November 15, 2010): 533-545. Accessed December 2, 2024. https://mma.vgtu.lt/index.php/MMA/article/view/6042.