Volume 15, Number 1, 1991
: A model logic for similarity relations in pawlak knowledge representation systems.
: On pure context-free language and left szilard languages.
: On the power of two-dimensional synchronized alternating finite automata.
Volume 15, Number 2, 1991
: Relationship chase procedures interpreted as resolution with paramodulation.
Volume 15, Number 3-4, 1991
: Monotonic and non-monotonic logics of knowledge.
Zbigniew W. Ras
: Query processing in distributed information systems.