MAKAROV, V. L.; DRAGUNOV, D.; SEMBER, D. A functional discrete method (FD-method) for solving the Cauchy problem for a nonlinear Klein–Gordon equation . Reports of the National Academy of Sciences of Ukraine, Kyiv, Ukraine, n. 10, p. 33–39, 2025. DOI: 10.15407/dopovidi2014.10.033. Disponível em: https://nasu-periodicals.org.ua/index.php/dp/article/view/16776. Acesso em: 10 may. 2026.