A correction to my paper: “Interdependence of weakened forms of axiom of choice” Tomáš Jech (1967) Commentationes Mathematicae Universitatis Carolinae Similarity:
On the Souslin-graph theorem Zdeněk Frolík (1968) Commentationes Mathematicae Universitatis Carolinae Similarity:
A remark on compactness of embeddings Vlastimil Pták (1969) Commentationes Mathematicae Universitatis Carolinae Similarity: