Reference

Efraín C. Hernández, Manuel Nogales, Vicente Quilis, Guillermo Delgado (1990): Nesting of the Manx Shearwater (Puffinus puffinus Brünnich, 1764) on the Island of Tenerife (Canary Islands) – Bonn zoological Bulletin - früher Bonner Zoologische Beiträge. – 41: 59 - 62.