Corrigendum on “The temperature dependence of the work function of oxide electrodes in fluorescent lamps [Eur. Phys. J. Appl. Phys. 92, 11301 (2020)]” and “Impact of damaging and recovery on the temperature dependence of the work function of oxide electrodes in fluorescent lamps [Eur. Phys. J. Appl. Phys. 96, 11301 (2021)] .