USTIMENKO, V. . On new results on extremal graph theory, theory of algebraic graphs, and their applications. Reports of the National Academy of Sciences of Ukraine, Kyiv, Ukraine, n. 4, p. 25–32, 2022. DOI: 10.15407/dopovidi2022.04.025. Disponível em: https://dopovidi-nanu.org.ua/ojs/index.php/dp/article/view/2022-4-4. Acesso em: 5 dec. 2022.