المؤلفون: McCullough, Jenna M., Feuerabendt, Wieland T., Londoño, Gustavo A.

المصدر: The Wilson Journal of Ornithology, 2019 Dec 01. 131(4), 817-824.

الوصول الحر: https://www.jstor.org/stable/27014211Test

المؤلفون: Karle, Isabella L., Wieland, T., Schermer, D., Ottenheym, H. C. J.

المصدر: Proceedings of the National Academy of Sciences of the United States of America, 1979 Apr 01. 76(4), 1532-1536.

الوصول الحر: https://www.jstor.org/stable/69544Test

المؤلفون: Buku, A., Faulstich, H., Wieland, T., Dabrowski, J.

المصدر: Proceedings of the National Academy of Sciences of the United States of America, 1980 May 01. 77(5), 2370-2371.

الوصول الحر: https://www.jstor.org/stable/8671Test