Collective flow in 2.76 and 5.02 A TeV Pb + Pb collisions Wenbin Zhao, Hao-jie Xu and Huichao Song Eur. Phys. J. C, 77 9 (2017) 645 Published online: 25 September 2017 DOI: 10.1140/epjc/s10052-017-5186-x