Siryk, S.V., and N.N. Salnikov. “On the Application of Mass Lumping in the Petrov–Galerkin Finite Element Method for Convection-Diffusion Problems”. Reports of the National Academy of Sciences of Ukraine, no. 5 (February 25, 2025): 39–44. Accessed August 13, 2025. https://nasu-periodicals.org.ua/index.php/dp/article/view/16507.