DIRECT CONNECTION ON THE MOVE: CHARACTERIZATION OF USER MOBILITY IN CELLULAR-ASSISTED D2D SYSTEMS Статья Orsino A., Moltchanov D., Gapeyenko M., Samuylov A., Andreev S., Militano L., Araniti G., Koucheryavy Y. IEEE Vehicular Technology Magazine. Том Vol 11 Issue 3. 2016. С. 38-48