Transit timing variations in HIP 41378: CHEOPS and TESS confirm a non-transiting sixth planet in the system - Leonardi, P.; Borsato, L.; Pagliaro, L.; Kubyshkina, D.; Egger, J. A.; Wilson, T.G.; Heitzmann, A.; Brandeker, A.; Günther, Maximilian N.; Nascimbeni, Valerio; Leleu, A.; Bonfanti, A.; et al. (Astronomy and Astrophysics, 2025)