John Krumm Ken Anderson Rodger Lea Michael Blackstock Mirjana Spasojevic Mizuko Ito Nancy A. Van House Ilpo Koskinen Fumitoshi Kato Maribeth Back Masatomi Inagaki Kazunori Horikiri Saadi Lahlou Rafael Ballagas Jeffrey Huang Surapong Lertsithichai Ame Elliott Scott D. Mainwaring Allison Woodruff Phoebe Sengers Thomas Riisgaard Hansen Jakob E. Bardram Ilkka Korhonen 109-112 2007 6 IEEE Pervasive Computing 2 http://doi.ieeecomputersociety.org/10.1109/MPRV.2007.48 db/journals/pervasive/pervasive6.html#KrummALBSIHKKBIHLBHLEMWSHBK07