The first measurable cardinal and the generalized continuum hypothesis Petr Vopěnka (1965) Commentationes Mathematicae Universitatis Carolinae Similarity:
Concerning a proof of ℵ α + 1 ≦ 2 ℵ α without axiom of choice: A correction Petr Vopěnka (1965) Commentationes Mathematicae Universitatis Carolinae Similarity:
Consistency theorems connected with some combinatorial problems Lev Bukovský (1966) Commentationes Mathematicae Universitatis Carolinae Similarity: