G. Gay and H. Hembrooke, Activity-Centered Design: an Ecological Approach to Designing Smart Tools and Usable Systems, 2004.

J. Fink and A. Kobsa, User Modeling for Personalized City Tours, In: Artificial Intelligence Review, vol.18, issue.1, 2002.

A. Kobsa, Generic User Modeling Systems, pp.1-2, 2001.
DOI : 10.1007/978-3-540-72079-9_4
URL : http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.21.8306

A. Kobsa, User Modeling: Recent Work, Prospects and Hazards Adaptive User Interfaces: Principles and Practice, 1993.

C. G. Jung, PSYCHOLOGICAL TYPES, The Journal of Nervous and Mental Disease, vol.60, issue.2, 1971.
DOI : 10.1097/00005053-192408000-00081

A. Jennings and H. Higuchi, A Personal News Service Based on a User Model Neural Network In: User Modeling and User-Adapted Interaction, 1992.

E. Rich, User Modeling via Stereotypes*, Cognitive Science, vol.84, issue.4, 1979.
DOI : 10.1207/s15516709cog0304_3

A. Mathes, Folksonomies -Cooperative Classification and Communication through Shared Metadata, 2004.

T. Berka and M. Plö?enig, Designing Recommender Systems for Tourism, 2003.

A. Felfernig, S. Gordea, D. Jannach, E. Teppan, and M. Zanker, A Short Survey of Recommendation Technologies in Travel and Tourism, In: ÖGAI Journal, vol.25, issue.2, 2006.

B. Coelho, C. Martins, and A. Almeida, ATOMICO -Arquitectura para Turistas com vista à Organização, Modelação e Inferência de COnhecimento -Representação do Utilizador, IADIS Ibero-Americana -WWW / Internet, 2008.

P. J. Oliver and S. Srivastava, The Big-Five Trait Taxonomy: History, Measurement and Theoretical. In: Handbook of Personality: Theory and Research, 1999.

R. B. Cattell, Handbook for the Sixteen Personality Factor Questionnaire. The 16 P.F. Test -Forms A, B, and C. Institute for Personality and Ability Testing, 1962.

R. Burke, Knowledge-Based Recommender Systems, 1999.

M. J. Pazzani and D. Billsus, Content-Based Recommendation Systems, Lecture Notes in Computer Science, vol.4321, 2007.
DOI : 10.1007/978-3-540-72079-9_10
URL : http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.130.8327

J. Porter, Watch and Learn: How Recommendation Systems are Redefining the Web, 2006.

I. Zukerman and D. W. Albrecht, Predictive Statistical Models for User Modeling In: User Modeling and User-Adapted Interaction, pp.1-2, 2000.