Sjögren, E. (2001). Distribution of Azorean bryophytes up to 1999, their island distribution and information on their presence elsewhere, including Madeira and the Canary Islands. Câmara Municipal.
Chicago-Zitierstil (17. Ausg.)Sjögren, Erik. Distribution of Azorean Bryophytes Up to 1999, Their Island Distribution and Information on Their Presence Elsewhere, Including Madeira and the Canary Islands. Funchal: Câmara Municipal, 2001.
MLA-Zitierstil (9. Ausg.)Sjögren, Erik. Distribution of Azorean Bryophytes Up to 1999, Their Island Distribution and Information on Their Presence Elsewhere, Including Madeira and the Canary Islands. Câmara Municipal, 2001.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.