@conference {25735,
	title = {Cost efficient power allocation in OFDMA cognitive radio networks},
	booktitle = {Proc. European Conference on Networks and Communications (EUCNC{\textquoteright}15) },
	year = {2015},
	author = {D{\textquoteright}Oro, Salvatore and Panayotis Mertikopoulos and Aris L. Moustakas and Palazzo, Sergio}
}
