Weak and strong convergence of projection methods in nonreflexive Banach spaces Rostislav Zezula (1974) Commentationes Mathematicae Universitatis Carolinae
Weak Stability and Weak Discrete Convergence of Continuous Mappings. F. Stummel (1976) Numerische Mathematik
What should be a rate of convergence ? Vlastimil Pták (1977) ESAIM: Mathematical Modelling and Numerical Analysis - Modélisation Mathématique et Analyse Numérique