SIRYK, S.; SALNIKOV, N. 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, Kyiv, Ukraine, n. 5, p. 39–44, 2025. DOI: 10.15407/dopovidi2014.05.039. Disponível em: https://nasu-periodicals.org.ua/index.php/dp/article/view/16507. Acesso em: 10 may. 2026.