@article{ATLAS:2019dbr, author = "Aad, Georges and others", collaboration = "ATLAS", title = "{Evidence for the production of three massive vectorbosons in $pp$ collisions with the ATLAS detector}", reportNumber = "ATL-PHYS-PROC-2019-054", doi = "10.22323/1.352.0135", journal = "PoS", volume = "DIS2019", pages = "135", year = "2019" }