The Database Group at University of Hagen (FernUniversitaet). - Gunter Schlageter; Thomas Berkel; Eberhard Heuel; Silke Mittrach; Andreas Scherer; Wolfgang Wilkes (SIGMOD Rec., 1995)

SWAPS: Semantic Web Approach for Personalisation of Study. - German Nemirovskij; Michael Thomas Egner; Eberhard Heuel (ICALT, 2007)

Quality Standards for e-Learning in Vocational Education and Training: The Certified European E-Tutor. - Eberhard Heuel; Birgit Feldmann (LTEC, 2013)