A. Rae, B. Sigurbjörnsson, and R. van Zwol. Adaptivity, Personalization and Fusion of Heterogeneous Information, page 92--99. Paris, France, Le Centre De Hautes Etudes Internationales d'Informatique Documentaire, (2010)
K. Siorpaes, and M. Hepp. Proceedings of the 5th European semantic web conference on The semantic web: research and applications, page 751--766. Berlin, Heidelberg, Springer-Verlag, (2008)
T. Green, G. Karvounarakis, and V. Tannen. PODS '07: Proceedings of the twenty-sixth ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems, page 31--40. New York, NY, USA, ACM, (2007)