Colaone, S.; Fanchin, B.; Giusto, A.; Guenzani, W.; Saporetti, F.; Zarbo, T. Playback Census of a Breeding Population of Little Owl, Athene Noctua, in NW Lombardy (Varese Province). Riv Ital Ornitol 2012, 80 (2). https://doi.org/10.4081/rio.2010.94.