N. L. Britton, J. N. Rose: The Cactaceae. Descriptions and Illustrations of Plants of the Cactus Family. BandII. The Carnegie Institution of Washington, Washington 1920, S.125 (online).
doi.org
Nadja Korotkova, Thomas Borsch, Salvador Arias: A phylogenetic framework for the Hylocereeae (Cactaceae) and implications for the circumscription of the genera. In: Phytotaxa. Band 327, Nummer 1, 2017, S. 19 (doi:10.11646/phytotaxa.327.1.1).