Chatrchyan, S., Khachatryan, V., Sirunyan, A.M., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., Ero, J., Fabjan, C., Friedl, M., Fruhwirth, R., Ghete, V.M., Hammer, J., Hansel, S., Hoch, M., Hormann, N., Hrubec, J., Jeitler, M., Kiesenhofer, W., Kr..............., “Search for physics beyond the standard model using multilepton signatures in pp collisions at root s=7 TeV”, Physics Letters B, 704, 5, 411-433, 2011