DENEGA, I.V.; ZABOLOTNYI, Ya.V. Some extremal problems on the Riemannian sphere. Carpathian Mathematical Publications, [S. l.], v. 16, n. 2, p. 593–605, 2024. DOI: 10.15330/cmp.16.2.593-605. Disponível em: https://journals.pnu.edu.ua/index.php/cmp/article/view/6603. Acesso em: 15 jan. 2025.