KADRY, S.; ALFEROV, G.; IVANOV, G.; SHARLAY, A. DERIVED NUMBERS OF ONE VARIABLE CONVEX FUNCTIONS. Italian Journal of Pure and Applied Mathematics, [S. l.], v. 41, p. 649–662, 2019. Disponível em: https://journals.uniurb.it/index.php/ijpam/article/view/7075. Acesso em: 17 oct. 2026.