Martin W., Johannes F., Hernan V. & Howard S.: Galápagos Birds and Diseases: Invasive Pathogens as Threats for Island Species (PDF full textLưu trữ 2008-05-16 tại Wayback Machine, 384 KB) 2004
wildcru.org
Martin W., Johannes F., Hernan V. & Howard S.: Galápagos Birds and Diseases: Invasive Pathogens as Threats for Island Species (PDF full textLưu trữ 2008-05-16 tại Wayback Machine, 384 KB) 2004