André C. Santos João M. P. Cardoso Diogo R. Ferreira Pedro C. Diniz Mobile Context Provider for Social Networking. 464-473 2009 OTM Workshops http://dx.doi.org/10.1007/978-3-642-05290-3_59 conf/otm/2009-w db/conf/otm/otm2009-w.html#SantosCFD09