[1]
J. L. Luteyn and P. Pedraza-Peñalosa, “Nomenclature, taxonomy, and conservation of the neotropical genus Sphyrospermum (Ericaceae: Vaccinieae), including five new species for Colombia, Ecuador, and Peru”, Phytotaxa, vol. 79, no. 1, pp. 1–29, Feb. 2013.