Search for new phenomena in events with three or more charged leptons in pp collisions at TeV with the ATLAS detector - Aad, G; Abbott, B; Abdallah, J; Khalek, SA; Abdinov, O; Aben, R; Abi, B; Abolins, M; AbouZeid, OS; Abramowicz, H; Abreu, H; Abreu, R; et al. (JOURNAL OF HIGH ENERGY PHYSICS, 2015)