Michael Gruninger Olivier Bodenreider Frank Olken Leo Obrst Peter Yim Ontology Summit 2007 - Ontology, taxonomy, folksonomy: Understanding the distinctions. 191-200 2008 3 Applied Ontology 3 http://dx.doi.org/10.3233/AO-2008-0052 db/journals/ao/ao3.html#GruningerBOOY08