L. Adamic, D. Wilkinson, B. Huberman, und E. Adar. CSB '02: Proceedings of the IEEE Computer Society Conference on Bioinformatics, Seite 109. Washington, DC, USA, IEEE Computer Society, (2002)
M. Chen, X. Liu, und J. Qin. DCMI '08: Proceedings of the 2008 International Conference on Dublin Core and Metadata Applications, Seite 117--127. Dublin Core Metadata Initiative, (2008)