To-Ming Lau, Anthony, and Yong Zhang. “Fixed Point Properties for Semigroups of Nonexpansive Mappings on Convex Sets in Dual Banach Spaces”. Annales Universitatis Paedagogicae Cracoviensis Studia Mathematica 17 (October 22, 2018): 67–87. Accessed July 21, 2026. https://studmath.uken.krakow.pl/article/view/12962.