Measurement of the ZZ production cross section and Z -> l(+)l(-)l '(+)l '(-) branching fraction in pp collisions at root s=13TeV - Khachatryan, V; Sirunyan, AM; Tumasyan, A; Adam, W; Asilar, E; Bergauer, T; Brandstetter, J; Brondolin, E; Dragicevic, M; Eroe, J; Flechl, M; Friedl, M; et al. (Physics Letters B, 2016)