Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., Erö, J., Fabjan, C., Friedl, M., Frühwirth, R., Ghete, V. M., Hammer, J., Hänsel, S., Hoch, M., Hörmann, N., Hrubec, J., Jeitler, M., Kasieczka, G., … Weinberg, M. (2011). Search for Supersymmetry in pp Collisions at s√ = 7 TeV in Events with Two Photons and Missing Transverse Energy. Physical Review Letters, 106(211802). https://doi.org/10.1103/physrevlett.106.211802