Wiktor Marek
Elements of logic and foundations of mathematics in problems
Elements of Logic and Foundations of Mathematics in Problems
Logic programming and non-monotonic reasoning
Nonmonotonic logic
Spectrum of L
A decomposition of informational systems
Elementy logiki i teorii mnogości w zadaniach
Mathematical foundations of information storage and retrieval
On the metamathematics of impredicative set theory
Set Theory and Hierarchy Theory A Memorial Tribute to Andrzej Mostowski