Carnevali, G., Cetzal-Ix, W., Tapia-Muñoz, J.L. and Romero-González, G.A. 2015.

The world upside down: the first Kefersteinia (Orchidaceae: Zygopetalinae) with non-resupinate flowers

. Phytotaxa. 239, 2 (Dec. 2015), 165–173. DOI:https://doi.org/10.11646/phytotaxa.239.2.5.