Rando, J.C., Pieper, H., Alcover, J.A. & Olson, S.L. (2012)

A new species of extinct fossil scops owl (Aves: Strigiformes: Strigidae: Otus) from the Archipelago of Madeira (North Atlantic Ocean)

. Zootaxa, 3182 (1), 29–42.