Volkov VM, Kachalouskaya EI. An iterative Chebyshev spectral solver for two-dimensional elliptic equations with variable coefficients. Журнал Белорусского государственного университета. Математика. Информатика. 2023;(3):53-62. Accessed July 19, 2026. https://journals.bsu.by/index.php/mathematics/article/view/5668