References
- Adanson , M. 1757 . Histoire Naturelle du Senegal Paris
- Chapman , G. and Newell , G. E. 1947 . The rôle of the body fluid in relation to movement in soft-bodied invertebrates—I. The burrowing of Arenicola . Proc. Roy. Soc. , 134 ( B ) : 431 – 455 .
- Drouet , H. 1861 . Eléments de la Faune Açoreene Paris
- Godman , F. du C. 1870 . Natural History of the Azores or Western Islands 2pl London
- Guerne , J. de . 1888 . Excursions zoologiques dan les îles de Fayal et de San Miguel. (Açores) Paris
- Guppy , H. B. 1917 . Plants, seeds and currents in the West Indies and Azores London
- Masson , F. 1778 . An account of the island of San Miguel . Phil. Trans. Roy. Soc. , 68 : 601 – 610 .
- Monaco , Prince de . 1889–1950 . Rés. Camp. Sci. Monaco
- Morelet , A. 1860 . Notice sur l'histoire naturelle des Açores Paris
- Nobre , A. 1930 . Materiais para o estudo da fauna dos Açores Oporto
- Simroth , H. 1888 . Zur Kentniss der Azorenfauna . Arch. Naturgesch. , 45 : 179 – 234 .
- Seubert , M. 1844 . Flora Azorica Bonn
- Seubert , M. and Hochstetter , C. F. 1843 . Uebersicht der Flora der azorischen Inseln . Arch. Naturgesch. , 9
- Trelease , W. 1897 . “ Botanical Observations on the Azores ” . In Eighth Ann. Rep. Mo. Bot. Gdn.
- Tutin , T. G. 1953 . The Vegetation of the Azores . J. Ecol. , 41 : 53 – 61 .
- Wallace , A. R. 1880 . Island Life London
- Watson , H. C. 1843 . Notes on a botanical tour in the Western Azores . London Journal of Botany , 2
- Wollaston , T. V. 1878 . Testacea Atlantica or the land and freshwater shells of the Azores, Madeiras, Salvages, Canaries, Cape Verdes and Saint Helena London