Ein Homotopieerweiterungssatz für kompakte Vektorfelder in topologischen Vektorräumen (Vorläufige Mitteilung) Siegfried Hahn (1976) Commentationes Mathematicae Universitatis Carolinae
Errata to: “Some fixed point theorems for mappings satisfying Frum-Ketkov conditions” [Comment. Math. Univ. Carolinae 17 (1976), no. 2, 399-411] Rainald Schöneberg (1976) Commentationes Mathematicae Universitatis Carolinae
Euler-Lagrange type cubic operators and their norms on X λ space. Najati, Abbas, Rahimi, Asghar (2008) Journal of Inequalities and Applications [electronic only]
Extensions of nonexpansive mappings in the Hilbert ball with the hyperbolic metric. I. Tadeusz Kuczumow, Adam Stachura (1988) Commentationes Mathematicae Universitatis Carolinae