Chase, Mark W.; Williams, Norris H.; Faria, De; Donisete, Aparacida; Neubig, Kurt M.; Amaral, Maria do Carmo E. & Whitten, W. Mark (1 August 2009), "Floral convergence in Oncidiinae (Cymbidieae; Orchidaceae): an expanded concept of Gomesa and a new genus Nohawilliamsia", Annals of Botany, 104 (3): 387–402, doi:10.1093/aob/mcp067, PMC2720657, PMID19346522
Chase, Mark W.; Williams, Norris H.; Faria, De; Donisete, Aparacida; Neubig, Kurt M.; Amaral, Maria do Carmo E. & Whitten, W. Mark (1 August 2009), "Floral convergence in Oncidiinae (Cymbidieae; Orchidaceae): an expanded concept of Gomesa and a new genus Nohawilliamsia", Annals of Botany, 104 (3): 387–402, doi:10.1093/aob/mcp067, PMC2720657, PMID19346522
pubmed.ncbi.nlm.nih.gov
Chase, Mark W.; Williams, Norris H.; Faria, De; Donisete, Aparacida; Neubig, Kurt M.; Amaral, Maria do Carmo E. & Whitten, W. Mark (1 August 2009), "Floral convergence in Oncidiinae (Cymbidieae; Orchidaceae): an expanded concept of Gomesa and a new genus Nohawilliamsia", Annals of Botany, 104 (3): 387–402, doi:10.1093/aob/mcp067, PMC2720657, PMID19346522