Mytnik-Ejsmont, J., Rutkowski, P., & Szlachetko, D. L. (2008). Five new species of Pachygenium (Schltr.) Szlach., R. González & Rutk. (Spirantheae, Cyclopogoninae, Orchidaceae) from Brazil. Biodiversity: Research and Conservation, (11-12), 3–8. https://doi.org/10.14746/biorc.2008.11-12.1