- Spies, M. (2007). An ontology modelling perspective on business reporting languages. Paper presented at the IEEE EDOC Enterprise Computing Conference - Vocabularies and Rules for The Enterprise Workshop, Annapolis, MD, October 15 to 19, 2007.
- Spies, M., & Roche, C. (2006). Aristotelian ontologies and OWL modeling. Paper presented at the Workshop on Philosophy and Informatics, Saarbrücken, May 3 to 4, 2006.