Testing the Quality of a Query Optimizer. - Michael Stillger; Johann Christoph Freytag (IEEE Data Eng. Bull., 1995)

AQuES: An Agent-based Query Evaluation System. - Michael Stillger; Johann K. Obermaier; Johann Christoph Freytag (CoopIS, 1997)

A Communication Infrastructure for a Distributed RDBMS (Research Note). - Michael Stillger; Dieter Scheffner; Johann Christoph Freytag (Euro-Par, 2000)

Implementing Geospatial Operations in an Object-Relational Database System. - Johann Christoph Freytag; Miro Flasza; Michael Stillger (SSDBM, 2000)

AQuES: ein flexibles, verteiltes System zur Optimierung und Auswertung relationaler Anfragen. - Michael Stillger (2000)

LEO - DB2's LEarning Optimizer. - Michael Stillger; Guy M. Lohman; Volker Markl; Mokhtar Kandil (VLDB, 2001)