Haruki Izumikawa Takashi Matsunaka Yoji Kishi Retarding application idle timer expiration for service resumption in challenged network. 644-648 2011 ISWCS https://doi.org/10.1109/ISWCS.2011.6125433 conf/iswcs/2011 db/conf/iswcs/iswcs2011.html#IzumikawaMK11