Argyros, I. K. “On the Solution of Nonlinear Equations With a Nondifferentiable Term”. Rev. Anal. Numér. Théor. Approx., vol. 22, no. 2, Aug. 1993, pp. 125-3, https://ictp.acad.ro/jnaat/journal/article/view/1993-vol22-no2-art2.