F. Rafael V. Guimaraes, Daniel Benevides da Costa, Theodoros A. Tsiftsis, Charles Casimiro Cavalcante, George K. Karagiannidis. Multiuser and Multirelay Cognitive Radio Networks Under Spectrum-Sharing Constraints. IEEE T. Vehicular Technology, 63(1):433-439, 2014. [doi]
Abstract is missing.