1. Q. Zhao, L. Tong, A. Swami, and Y. Chen, “Decentralized cognitive MAC for opportunistic spectrum access in ad hoc networks: A POMDP framework,” IEEE J. Sel. Areas Commun., vol. 25, no. 3, pp. 589–600, Apr. 2007.
2. Q. Zhao, S. Geirhofer, L. Tong, and B. M. Sadler, “Opportunistic spectrum access via periodic channel sensing,” IEEE Trans. Signal Process., vol. 56, no. 2, pp. 785–796, Feb. 2008.
3. I. F. Akyildiz, W. Y. Lee, M. C. Vuran, and S. Mohanty, “NeXt generation/dynamic spectrum access/cognitive radio wireless networks: A survey,” Computer Networks (Elsevier), vol. 50, no. 13, pp. 2127–2159, Sep. 2006.
4. I. F. Akyildiz, W. Y. Lee, M. C. Vuran, and S. Mohanty, “A survey on spectrum management in cognitive radio networks,” IEEE Commun. Mag., vol. 46, no. 4, pp. 40–48, Apr. 2008.
5. Q. Zhao and B. M. Sadler, “A survey of dynamic spectrum access: Processing, networking, and regulatory policy,” IEEE Signal Process. Mag., vol. 24, no. 3, pp. 79–89, May 2007.