Ioannis K. Argyros, et al. “Semilocal Convergence of a Newton-Secant Solver for Equations With a Decomposition of Operator”. Journal of Computational Analysis and Applications (JoCAAA), vol. 29, no. 2, Mar. 2021, pp. 279-8, https://eudoxuspress.com/index.php/pub/article/view/148.