LUNYOV, A. A.; OLIYNYK, E. V. On a class of systems of equations of the Lax type . Reports of the National Academy of Sciences of Ukraine, Kyiv, Ukraine, n. 1, p. 25–30, 2025. DOI: 10.15407/dopovidi2015.01.025. Disponível em: https://nasu-periodicals.org.ua/index.php/dp/article/view/12951. Acesso em: 11 jan. 2025.