Temporale Planung in Multiagentenumgebungen. - Andreas Winklhofer; Gerhard Köstler (Wissensbasierte Systeme, 1991)

Fixpoint evaluation with subsumption for probabilistic uncertainty - Werner Kießling; Gerhard Köstler; Ulrich Güntzer (Forschungsberichte, TU Munich, 1992)

The Differential Fixpoint Operator with Subsumption. - Gerhard Köstler; Werner Kießling; Helmut Thöne; Ulrich Güntzer (DOOD, 1993)

Foundations of semantic subsumption in deductive databases. - Gerhard Köstler (1995)

Taxonomic and Uncertain Integrity Constraints in Object-Oriented Databases - the TOP Approach. - Thomas Lukasiewicz; Werner Kießling; Gerhard Köstler; Ulrich Güntzer (CIKM, 1995)

Fixpoint Iteration with Subsumption in Deductive Databases. - Gerhard Köstler; Werner Kießling; Helmut Thöne; Ulrich Güntzer (J. Intell. Inf. Syst., 1995)

Subtyping by Constraints in Object-Oriented Databases. - Wolfgang L. J. Kowarschick; Gerhard Köstler; Werner Kießling (ISOTAS, 1996)

Client-Server Optimization for Multimedia Document Exchange. - Gerhard Köstler; Wolfgang L. J. Kowarschick; Werner Kießling (DASFAA, 1997)

Multimedia-Kurs Datenbanksysteme. - Werner Kießling; Gerhard Köstler (Springer, 1998)

Preference SQL - Design, Implementation, Experiences. - Werner Kießling; Gerhard Köstler (VLDB, 2002)