Abraham Esquivel Pablo A. Haya Manuel García-Herranz Xavier Alamán Managing Pervasive Environment Privacy Using the "fair trade" Metaphor. 804-813 2007 conf/otm/2007-w2 OTM Workshops (2) http://dx.doi.org/10.1007/978-3-540-76890-6_6 db/conf/otm/otm2007-w2.html#EsquivelHGA07