Heeyeol Yu Jayakrishnan V. Iyer Hogil Kim Eun Jung Kim Ki Hwan Yum Pyeong Soo Mah Assuring K-Coverage in the Presence of Mobility in Wireless Sensor Networks. 2006 conf/globecom/2006 GLOBECOM http://dx.doi.org/10.1109/GLOCOM.2006.942 db/conf/globecom/globecom2006wsn.html#YuIKKYM06