Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Asilar, E., Bergauer, T., Brandstetter, J., Brondolin, E., Dragicevic, M., Erö, J., Flechl, M., Friedl, M., Frühwirth, R., Ghete, V. M., Hartl, C., Hörmann, N., Hrubec, J., Jeitler, M., Knünz, V., … Woods, N. (2016). Search for exotic decays of a Higgs boson into undetectable particles and one or more photons. Physics Letters B, 753, 363–388. https://doi.org/10.1016/j.physletb.2015.12.017