On Symmetric Riemann-Derivatives. Indian Journal of Advanced Mathematics (IJAM), [S. l.], v. 1, n. 2, p. 47–51, 2024. DOI: 10.54105/ijam.B1114.101221. Disponível em: https://www.journals.latticescipub.com/index.php/ijam/article/view/590.. Acesso em: 23 jun. 2025.