G. Aad, B. Abbott, J. Abdallah, A.A. Abdelalim, A. Abdesselam, Z. Hubáček, M. Vlasák, K. Augsten, T. Horažďovský, J. Jakůbek et al.: Search for strong gravity signatures in same-sign dimuon final states using the ATLAS detector at the LHC. Physics Letters B 709(4-5), 322-340 (2012). doi:10.1016/j.physletb.2012.02.049