Potra, F. A. “On an Iterative Method for Solving Nonlinear Equations in Odered Banach Spaces”. Anal. Numér. Théor. Approx., vol. 8, no. 1, Feb. 1979, pp. 79-82, https://ictp.acad.ro/jnaat/journal/article/view/1979-vol8-no1-art9.