@article{UBHD-68038395,
  author={Arshad, Muhammad and González, Javier and Sayed, Abdel-Aziz Abdel-Fattah Abdel-Aziz el and Wink, Michael},
  title={Phylogeny and phylogeography of critically endangered Gyps species based on nuclear and mitochondrial markers},
  year={2009},
  pages={419-430},
  language={eng},
  issn={2193-7206},
  volume={150},
  number={2},
  note={Gesehen am 12.10.2016},
  journal={Journal of ornithology},
  doi={10.1007/s10336-008-0359-x},
}
@book{UBHD-66366689,
  author={Sayed, Abdel-Aziz Abdel-Fattah Abdel-Aziz el},
  title={Phylogenetic relationships of diurnal raptors based on nucleotide sequences of cytochrome b and RAG-1 genes},
  year={2007},
  pages={V, 90 Bl.},
  language={eng},
  note={Zsfassung in dt. Sprache},
  school={Heidelberg, Univ., Diss., 2007},
  library={UB [Signatur: 2007 U 641]},
}
@article{UBHD-68041315,
  author={Wink, Michael and Sayed, Abdel-Aziz Abdel-Fattah Abdel-Aziz el and Sauer-G{\"u}rth, Hedwig and González, Javier},
  title={Molecular phylogeny of owls (Strigiformes) inferred from DNA sequences of the mitochondrial cytochrome b and the nuclear RAG-1 gene},
  year={2009},
  pages={581-591},
  language={eng},
  volume={97},
  number={4},
  note={Gesehen am 21.10.2016},
  journal={BioOne},
  doi={10.5253/078.097.0425},
}