“The Method of Constructing of Dirichlet Boundary Value Problem Basis for Variational Methods”. Bulletin of V.N. Karazin Kharkiv National University, series «Mathematical modeling. Information technology. Automated control systems» 31, no. 1 (November 20, 2016): 5–15. Accessed October 25, 2026. https://periodicals.karazin.ua/mia/article/view/6804.