B. G, und S. Buck. 2, Kapitel in Encyclopedia of Portal Technology and Applications, Seite 653-657. Hershey, PA, Information Science Reference, USA, (2007)http://lccn.loc.gov/2007007262.
J. Gonzalez-Olalla, und G. Stumme. Semantic Web Mining. Proc. of the Semantic Web Mining Workshop of the 13th Europ. Conf., Seite 90. Helsinki, (August 2002)