Some existence theorems for nonlinear problems Josef Kolomý (1966) Commentationes Mathematicae Universitatis Carolinae Similarity:
The solvability of non-linear integral equations Josef Kolomý (1967) Commentationes Mathematicae Universitatis Carolinae Similarity:
A categorical generalization of a theorem of G. Birkhoff on primitive classes of universal algebras Karel Drbohlav (1965) Commentationes Mathematicae Universitatis Carolinae Similarity: