Paul G. Spirakis Algorithmic and Foundational Aspects of Sensor Systems: (Invited Talk). 3-8 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3121&spage=3 2004 conf/algosensors/2004 ALGOSENSORS db/conf/algosensors/algosensors2004.html#Spirakis04