Hool, Sara-Lynn; Beckmann, Sven; Hakim, Arsany; Yacoub, Abraam; Caversaccio, Marco; Wagner, Franca; Anschuetz, Lukas (2023). Variability of the retrotympanum and its association with mastoid pneumatization in cholesteatoma patients. European archives of oto-rhino-laryngology, 280(1), pp. 131-136. Springer 10.1007/s00405-022-07465-w