Philipp Obreiter Birgitta König-Ries Georgios Papadopoulos 0002 Engineering Incentive Schemes for Ad Hoc Networks. 395-404 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3268&spage=395 2004 conf/edbtw/2004 EDBT Workshops db/conf/edbtw/edbtw2004.html#ObreiterKP04