A Selection Scheme for Optimum Number of   Cooperative Secondary Users in Spectrum Sensing
LIN Ying-pei (林英沛), HE Chen (何 晨), JIANG Ling-ge (蒋铃鸽), HE Di (何 迪)
Journal of shanghai Jiaotong University (Science) . 2011, (6): 652 -657 .  DOI: 10.1007/s12204-011-1206-4