T. Spathopoulos, O. Onireti, A. Khan, M. Imran, and K. Arshad, "Hybrid cognitive satellite terrestrial coverage," in Cognitive Radio Oriented Wireless Networks (M. Weichold, M. Hamdi, M. Z. Shakir, M. Abdallah, G. K. Karagiannidis, and M. Ismail, eds.), vol. 156 of Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, pp. 523-533, Springer International Publishing, 2015.