Calvente, A.; Zappi, D.C.; Forest, F.; Lohmann, L.G. (2011), "Molecular Phylogeny, Evolution, and Biogeography of South American Epiphytic Cacti", International Journal of Plant Sciences, 172 (7), ss. 902-914, doi:10.1086/660881
Calvente, A.; Zappi, D.C.; Forest, F.; Lohmann, L.G. (2011), "Molecular Phylogeny, Evolution, and Biogeography of South American Epiphytic Cacti", International Journal of Plant Sciences, 172 (7), ss. 902-914, doi:10.1086/660881
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