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\bibitem{ATLASCollaborationAaboud_etal2019} ATLAS Collaboration(Aaboud, M. et al), Alvarez Piqueras, D., Aparisi Pozo, J. A., Bailey, A. J., Barranco Navarro, L., Cabrera Urban, S., et al. (2019). Combination of Searches for Invisible Higgs Boson Decays with the ATLAS Experiment. \textit{Phys. Rev. Lett.}, \textit{122}(23), 231801--20pp.

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