G. Aad, B. Abbott, J. Abdallah, S. Abdel Khalek, O. Abdinov, K. Augsten, D. Caforio, P. Gallus, J. Guenther, J. Jakůbek et al.: Search for a CP-odd Higgs boson decaying to Zh in pp collisions at root s=8 TeV with the ATLAS detector. Physics Letters B 744, 163-183 (2015). doi:10.1016/j.physletb.2015.03.054