VAKHNENKO, V. A single pole and a duble pole in the inverse scattering transform method . Reports of the National Academy of Sciences of Ukraine, Kyiv, Ukraine, n. 7, p. 10–17, 2024. DOI: 10.15407/dopovidi2017.07.010. Disponível em: https://nasu-periodicals.org.ua/index.php/dp/article/view/7673. Acesso em: 18 apr. 2026.