Roberto Aldunate Miguel Nussbaum Feniosky Peña-Mora An Empirical Wi-Fi Based Location Mechanism for Urban Search and Rescue Operations. 48-61 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2957&spage=48 2004 conf/wwic/2004 WWIC db/conf/wwic/wwic2004.html#AldunateNP04