POLULYAKH, Y. On level sets of a pseudoharmonic function on a plane . Reports of the National Academy of Sciences of Ukraine, Kyiv, Ukraine, n. 1, p. 22–26, 2025. DOI: 10.15407/dopovidi2014.01.022. Disponível em: https://nasu-periodicals.org.ua/index.php/dp/article/view/17403. Acesso em: 19 apr. 2026.