Ruzana Davoyan Jörn Altmann Wolfgang Effelsberg A New Bilateral Arrangement between Interconnected Providers. 85-96 2009 ICQT http://dx.doi.org/10.1007/978-3-642-01796-4_9 conf/icqt/2009 db/conf/icqt/icqt2009.html#DavoyanAE09