Fixed point theorems of Rothe-type for Frum-Ketkov- and 1-set-contractions H. Buley (1978) Commentationes Mathematicae Universitatis Carolinae Similarity:
On extremal structure of weakly locally compact convex sets in Banach spaces Václav Zizler (1972) Commentationes Mathematicae Universitatis Carolinae Similarity: