Manas, P., Angioni, C., Kappatou, A., Ryter, F., Schneider, P. A., & ASDEX Upgrade Team, Max Planck Institute for Plasma Physics, Max Planck Society (2019). The confinement of helium tokamak plasmas, impact of electron heating, turbulent transport and zonal flows. Nuclear Fusion, 59: 014002. doi:10.1088/1741-4326/aaeeb5.