H. Drias. Proceedings of the 2011 IEEE/WIC/ACM International Conferences on Web Intelligence and Intelligent Agent Technology - Volume 01, page 36--39. Washington, DC, USA, IEEE Computer Society, (2011)
O. Alonso, J. Strötgen, R. Baeza-Yates, and M. Gertz. Proceedings of the 1st International Temporal Web Analytics Workshop, volume 707 of CEUR Workshop Proceedings, page 1-8. CEUR-WS.org, (2011)