ZASADKO, T. Group analysis of two-dimensional Schrödinger equations with variable mass . Reports of the National Academy of Sciences of Ukraine, Kyiv, Ukraine, n. 5, p. 7–14, 2025. DOI: 10.15407/dopovidi2015.05.007. Disponível em: https://nasu-periodicals.org.ua/index.php/dp/article/view/14966. Acesso em: 18 apr. 2026.