Understanding 5G Wireless Cellular Network: Challenges, Emerging Research Directions and Enabling Technologies.Published in:Wireless Personal Communications, 2017, v. 95, n. 2, p. 261, doi. 10.1007/s11277-016-3891-7By:Farooq, M.;Waseem, Muhammad;Qadri, M.;Waqar, MuhammadPublication type:Article