BioStor
 | Five new species of birds from cave deposits in Porto Rico (1920) Proceedings of The Biological Society of Washington 33: 77-82 |
 | A New Species Of Milvago From Hispaniola Haiti With Notes On Other Fossil Caracaras From The West-Indies Aves Falconidae S L Olson (1976) Proceedings of The Biological Society of Washington 88: 355-366 |
 | Further Characterization Of Caracara Creightoni Brodkorb Based On Fossils From The Quaternary Of Cuba (Aves : Falconidae) W Suarez and S L Olson (2001) Proceedings of The Biological Society of Washington 114: 501-508 |