BASTOS, Nuno R. O. Calculus of variations involving Caputo-Fabrizio fractional differentiation. Statistics, Optimization & Information Computing, [S. l.], v. 6, n. 1, p. 12–21, 2018. DOI: 10.19139/soic.v6i1.466. Disponível em: https://iapress.org/index.php/soic/article/view/soic.20180303. Acesso em: 8 may. 2026.