M. Aaboud, G. Aad, B. Abbott, J. Abdallah, B. Ali, K. Augsten, D. Caforio, P. Gallus, M. Havránek, Z. Hubáček et al.: Measurement of b-hadron pair production with the ATLAS detector in proton-proton collisions at root s=8 TeV. Journal of High Energy Physics 2017(11), 62 (2017). doi:10.1007/JHEP11(2017)062