Article
Eur. Phys. J. C  (2017)

Measurement of the $t\overline{t}Z$ and $t\overline{t}W$ production cross sections in multilepton final states using 3.2 ${fb}^{-1}$ of pp collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector.

Morad Aaboud et al.