Vivek Mhatre Catherine Rosenberg Daniel Kofman Ravi Mazumdar Ness B. Shroff Design of Surveillance Sensor Grids with a Lifetime Constraint. 263-275 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2920&spage=263 2004 conf/ewsn/2004 EWSN db/conf/ewsn/ewsn2004.html#MhatreRKMS04