Khachatryan, V., Sirunyan, A.M., Tumasyan, A., Gülmez, E., Kaya, M., Kaya, O., Yetkin, E.A., Yetkin, T., et.al., 'Measurement of Long-Range Near-Side Two-Particle Angular Correlations in pp Collisions at root s=13 TeV', Physical Review Letters, 116, 17, 2016.