Afzal, A., A. Feki, M. Debbah, A. S. Zaidi, M. Ghogho, and D. McLernon,
"Leveraging D2D to Maximize the Spectral Efficiency of Massive MIMO Systems",
15th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks, Telecom ParisTech, Paris, France, 2017.