Measey, G. J.; Vences, M.; Drewes, R. C.; Chiari, Y.; Melo, M.; Bourles, B. (2006). "Freshwater paths across the ocean: Molecular phylogeny of the frog Ptychadena newtoni gives insights into amphibian colonization of oceanic islands". Journal of Biogeography. 34: 7–20. doi:10.1111/j.1365-2699.2006.01589.x. S2CID17562846.
Figueiredo Estrela (December 1994), "Diversity and endemism of angiosperms in the Gulf of Guinea islands", Biodiversity and Conservation, 3 (9): 785–793, doi:10.1007/BF00129658, ISSN1572-9710
Measey, G. J.; Vences, M.; Drewes, R. C.; Chiari, Y.; Melo, M.; Bourles, B. (2006). "Freshwater paths across the ocean: Molecular phylogeny of the frog Ptychadena newtoni gives insights into amphibian colonization of oceanic islands". Journal of Biogeography. 34: 7–20. doi:10.1111/j.1365-2699.2006.01589.x. S2CID17562846.
worldcat.org
Figueiredo Estrela (December 1994), "Diversity and endemism of angiosperms in the Gulf of Guinea islands", Biodiversity and Conservation, 3 (9): 785–793, doi:10.1007/BF00129658, ISSN1572-9710