MDDQL-Stat: Data Querying and Analysis through Integration of Intentional and Extensional Semantics. - Epaminondas Kapetanios; David Baer; Björn Glaus; Paul Groenewoud (SSDBM, 2004)

Railway Delay Management: Exploring Its Algorithmic Complexity. - Michael Gatto; Björn Glaus; Riko Jacob; Leon Peeters; Peter Widmayer (SWAT, 2004)