Sasank Reddy Katie Shilton Jeff Burke Deborah Estrin Mark H. Hansen Mani B. Srivastava Using Context Annotated Mobility Profiles to Recruit Data Collectors in Participatory Sensing. 52-69 2009 LoCA http://dx.doi.org/10.1007/978-3-642-01721-6_4 conf/loca/2009 db/conf/loca/loca2009.html#ReddySBEHS09