Susan Juan Pan Daniel Boston Cristian Borcea Analysis of fusing online and co-presence social networks. 496-501 2011 PerCom Workshops https://doi.org/10.1109/PERCOMW.2011.5766940 https://doi.ieeecomputersociety.org/10.1109/PERCOMW.2011.5766940 conf/percom/2011w db/conf/percom/percomw2011.html#PanBB11