Gutlyanskiĭ, V. ., Ryazanov, V. ., Sevost’yanov, E. . and Yakubov, E. . (2023) “Hydrodynamic normalization conditions in the theory of degenerate Beltrami equations”, Reports of the National Academy of Sciences of Ukraine. Kyiv, Ukraine, (2), pp. 10–17. doi: 10.15407/dopovidi2023.02.010.