Molecular phylogeny of owls (Strigiformes) inferred from DNA sequences of the mitochondrial cytochrome b and the nuclear RAG-1 gene - Wink, Michael; Sayed, Abdel-Aziz Abdel-Fattah Abdel-Aziz el; Sauer-Gürth, Hedwig; González, Javier (BioOne. BioOne Complete, 2009)