Four-lepton production in gluon fusion at NLO matched to parton showers Simone Alioli, Silvia Ferrario Ravasio, Jonas M. Lindert and Raoul Röntsch Eur. Phys. J. C, 81 8 (2021) 687 Published online: 03 August 2021 DOI: 10.1140/epjc/s10052-021-09470-5