Amre El-Hoiydi Jean-Dominique Decotignie WiseMAC: An Ultra Low Power MAC Protocol for Multi-hop Wireless Sensor Networks. 18-31 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3121&spage=18 2004 conf/algosensors/2004 ALGOSENSORS db/conf/algosensors/algosensors2004.html#El-HoiydiD04