Quartic Convex Type Piecewise Polynomial. Analysis in Theory and Applications, [S. l.], v. 28, n. 2, p. 172–179, 2012. DOI: 10.3969/j.issn.1672-4070.2012.02.007. Disponível em: https://www.global-sci.com/index.php/ata/article/view/7946. Acesso em: 5 dec. 2025.