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Cognitive Radio (CR) enables dynamic spectrum access to utilize licensed spectrum when it is idle. CR technology is applied to wireless ad hoc and sensor networks, to form Cognitive Radio Ad Hoc Networks (CRAHNs) and Cognitive Radio Sensor Networks (CRSNs), respectively. Clustering is an efficient topology management technique to regulate communication and allocate spectrum resources by CR capabilities of nodes in CRAHNs and CRSNs. In this paper, we thoroughly investigate benefits anddoi:10.1109/mcom.2018.1700767 fatcat:sipcwvq2znbrbaczkpohwlbwmm