Search for an Lμ - Lτ gauge boson using Z→4μ events in proton-proton collisions at √s = 13 TeV - Sirunyan, AM; Tumasyan, A; Adam, W; Ambrogi, F; Asilar, E; Bergauer, T; Brandstetter, J; Dragicevic, M; Ero, J; Del, Valle AE; Flechl, M; Fruhwirth, R; et al. (Physics Letters B, 2019)