K. Liu, B. Fang, и W. Zhang. Proceedings of the 19th ACM International Conference on Information and Knowledge Management, стр. 1109--1118. New York, NY, USA, ACM, (2010)
H. Kim, S. Scerri, J. Breslin, S. Decker, и H. Kim. Proceedings of the 2008 International Conference on Dublin Core and Metadata Applications, стр. 128--137. Berlin, Deutschland, Dublin Core Metadata Initiative, (2008)