Friesen, V. L.; Anderson, D. J.; Steeves, T. E.; Jones, H. & Schreiber, E. A. (2002): Molecular Support for Species Status of the Nazca Booby (Sula granti). Auk119(3): 820–26. [angla kun hispana resumo] DOI: 10.1642/0004-8038(2002)119[0820:MSFSSO]2.0.CO;2 PDF plena tekstoArkivigite je 2006-05-23 per la retarkivo Wayback Machine
web.archive.org
Friesen, V. L.; Anderson, D. J.; Steeves, T. E.; Jones, H. & Schreiber, E. A. (2002): Molecular Support for Species Status of the Nazca Booby (Sula granti). Auk119(3): 820–26. [angla kun hispana resumo] DOI: 10.1642/0004-8038(2002)119[0820:MSFSSO]2.0.CO;2 PDF plena tekstoArkivigite je 2006-05-23 per la retarkivo Wayback Machine