Extending the Convexity of Nonlinear Image of a Ball Appearing in Optimization. Contemporary Mathematics , [S. l.], v. 1, n. 4, p. 209–214, 2020. DOI: 10.37256/cm.142020405. Disponível em: https://ojs353.mebyme.cn/index.php/CM/article/view/405. Acesso em: 24 dec. 2025.