Šnicer J., Bohata J., Myšák V., The Littlest Lophophora, Cactus and Succulent Journal, 2009, 81(6):294-300, doi: 10.2985/015.081.0606
An article by the authors of Lophophora alberto-vojtechii that expands on the original 2008 description. It presents the discovery, structure of underground parts and the crown, flowering, fruits, seed comparison under an electron microscope, alluvial habitat and seasonal changes in stem position. It lists new locality reports and a key to five species in the authors' treatment. Observations of insect visits and a low-temperature episode retain the scope of field reports.