Coefficient Inequalities for Concave Ces´aro Operator of Non-concave Analytic Functions. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 3, n. 6, p. 1086–1092, 2010. Disponível em: https://www.ejpam.com/ejpam/article/view/743. Acesso em: 24 feb. 2026.