STEFANCHUK, M. V. Extremal elements in a hypercomplex space . Reports of the National Academy of Sciences of Ukraine, Kyiv, Ukraine, n. 4, p. 13–19, 2024. DOI: 10.15407/dopovidi2016.04.013. Disponível em: https://nasu-periodicals.org.ua/index.php/dp/article/view/9707. Acesso em: 28 oct. 2024.