Szlachetko, D.L. et al. 2006. Siederella Szlach. & al. and Irenea Szlach. & al. - new genera of the tribe Oncidieae (Orchidaceae). Biodiversity: Research and Conservation. 1-2 (Dec. 2006), 4–6. DOI:https://doi.org/10.14746/biorc.2006.1-2.1.