Argyros, Ioannis K. “ An Error Analysis for the Steffensen Method under Generalized Zabrejko-Ngyen-Type Assumptions”. Rev. Anal. Numér. Théor. Approx. 25, no. 1 (August 1, 1996): 11–22. Accessed September 3, 2025. https://www.ictp.acad.ro/jnaat/journal/article/view/1996-vol25-nos1-2-art2.