Soori, Ebrahim, Ravi P. Agarwal, and Donal O'Regan. “Existence of Sunny Nonexpansive Retractions and Approximation of Fixed Points of a Representation of Nonexpansive Mappings”. Nonlinear Analysis: Modelling and Control 29, no. 5 (July 1, 2024): 878–889. Accessed April 7, 2025. https://www.journals.vu.lt/nonlinear-analysis/article/view/35559.