Chaoub, Abdelaali; Kamouch, Ali; Guennoun, Zouhair: 'Energy efficiency gains through opportunistic cooperative schemes in cognitive radio networks' (Telecommunications, 2017), 'Cloud and Fog Computing in 5G Mobile Networks: Emerging advances and applications', Chap. 12, pp. 325-348, DOI: 10.1049/PBTE070E_ch12
IET Digital Library, https://digital-library.theiet.org/;jsessionid=g7369khhk7ib2.x-iet-live-01content/books/10.1049/pbte070e_ch12