A gentle introduction to the Semantic Web by Sean B. Palmer, 2001
This document is designed as being a simple but comprehensive introductory publication for anybody trying to get into the Semantic Web: from beginners through to long time hackers
E. Oren, M. Volkel, J. Breslin, and S. Decker. Database and Expert Systems Applications, 4080/2006, page 509-518. Springer Berlin / Heidelberg, (September 2006)