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Seyed Babak Musavi, Ali Khani, Abolghasem Khaleghizadeh & Magnus Robb: The first confirmed records of Omani Owl, Strix butleri (A. O.Hume, 1878) (Aves: Strigidae), from Iran. In: Zoology in the Middle East, 62:1, 2016, S. 21–24, doi:10.1080/09397140.2015.1132563
