Militano, L. ., G. . Araniti, M. . Condoluci, I. . Farris, and A. . Iera. “Device-to-Device Communications for 5G Internet of Things”. EAI Endorsed Transactions on Internet of Things, vol. 1, no. 1, Oct. 2015, p. e4, doi:10.4108/eai.26-10-2015.150598.