TOMCHENKO, M. Quasimomentum of an elementary excitation for a system of point bosons under zero boundary conditions . Reports of the National Academy of Sciences of Ukraine, Kyiv, Ukraine, n. 12, p. 49–56, 2024. DOI: 10.15407/dopovidi2019.12.049. Disponível em: https://nasu-periodicals.org.ua/index.php/dp/article/view/2523. Acesso em: 23 dec. 2024.