ORTÚÑEZ, E.; GAMARRA, R.; GESTAL, S.; HERNANDO, ÁLVARO; GALÁN CELA, P. Revision of Eulophia (Orchidaceae) in Nigeria, Cameroon, Equatorial Guinea, Gabon, and the Republic of the Congo. Plant Ecology and Evolution, v. 153, n. 3, p. 399-426, 23 nov. 2020.