@Inproceedings{volz2003eoitsw, author = "Raphael Volz", booktitle = "Proc. of the 20th British National Conference on Databases (BNCOD), Coventry, UK, July 2003", pages = "67-74", publisher = "Springer", title = "External Ontologies in the Semantic Web", volume = "2712", year = "2003", }