1. On local merotopic character;Simon;Comment. Math. Univ. Carol.,1971
2. A note on Rudin's example of Dowker space;Simon;Comment. Math. Univ. Carol.,1971
3. A note on Rudin's example of Dowker space;Simon,1972
4. A note on cardinal invariants of square;Simon;Comment. Math. Univ. Carol.,1973
5. A weakly pseudocompact subspace of Banach space is weakly compact;Preiss;Comment. Math. Univ. Carol.,1974