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Szlachetko, Dariusz L. 1961-, Joanna 1975- Mytnik-Ejsmont, Przemyslaw Baranow, Elzbieta 1985-2017 Grochocka, Slawomir 1988- Nowak, Hanna Bogna 1968- Margonska, and Aleksandra Naczk. Orchidaceae of West-Central Africa: (Suthern Chad, Cameroon, Central African Republic, São Tomé and Príncipe, Equatorial Guinea, Gabon, Republic of the Congo, Democratic Republic of the Congo, Nothern Angola). Koenigstein, Germany: Koeltz Scientific Books, 2015.

Szlachetko, Dariusz L. 1961-, et al. Orchidaceae of West-Central Africa: (Suthern Chad, Cameroon, Central African Republic, São Tomé and Príncipe, Equatorial Guinea, Gabon, Republic of the Congo, Democratic Republic of the Congo, Nothern Angola). Koenigstein, Germany: Koeltz Scientific Books, 2015.