Patroklos G. Argyroudis Timothy K. Forde Linda Doyle Donal O'Mahony A Policy-Driven Trading Framework for Market-Based Spectrum Assignment. 246-250 2007 conf/policy/2007 POLICY http://doi.ieeecomputersociety.org/10.1109/POLICY.2007.2 db/conf/policy/policy2007.html#ArgyroudisFDO07