G. Aad, B. Abbott, J. Abdallah, O. Abdinov, K. Augsten, D. Caforio, P. Gallus, J. Guenther, Z. Hubáček, J. Jakůbek et al.: Evidence for single top-quark production in the s-channel in proton-proton collisions at root s=8 TeV with the ATLAS detector using the Matrix Element Method. Physics Letters B 756, 228-246 (2016). doi:10.1016/j.physletb.2016.03.017