K. Bischoff, C. Firan, W. Nejdl, and R. Paiu. CIKM '08: Proceeding of the 17th ACM conference on Information and knowledge management, page 193--202. New York, NY, USA, ACM, (2008)
C. Firan, W. Nejdl, and R. Paiu. Proceedings of the 2007 Latin American Web Conference (LA-WEB), page 32-41. Washington, DC, USA, IEEE Computer Society, (2007)