Martin Dzbor Enrico Motta Carlos Buil Jose M. Gomez Olaf Görlitz Holger Lewen Developing Ontologies in OWL: an Observational Study. 2006 OWLED http://ceur-ws.org/Vol-216/submission_30.pdf conf/owled/2006 db/conf/owled/owled2006.html#DzborMBGGL06