Romero Silva, Rafael. «Non-Linear Regressio Analysis for Unconstrained Optimization Using Numerical Differentiation». Rev. Téc. Fac. Ing. Univ. Zulia 5, no. 1 (1). Accedido enero 16, 2026. http://mail.produccioncientificaluz.org/index.php/tecnica/article/view/4156.