A Spectrum and Energy Cooperation Strategy in Hierarchical Cognitive Radio Cellular Networks. - Kun-Yueh Hsieh; Fan-Shuo Tseng; Meng-Lin Ku (IEEE Wirel. Commun. Lett., 2016)

Information and Energy Cooperation in Overlay Hierarchical Cognitive Radio Networks. - Kun-Yueh Hsieh; Fan-Shuo Tseng; Meng-Lin Ku; Chao-Yuan Hsu (ICUFN, 2018)