Phivos Mylonas David Vallet Pablo Castells Miriam Fernández Yannis S. Avrithis Personalized information retrieval based on context and ontological knowledge. 73-100 2008 23 Knowledge Eng. Review 1 http://dx.doi.org/10.1017/S0269888907001282 db/journals/ker/ker23.html#MylonasVCFA08