Karremans, A. P., F. Pupulin, and A. Damián-Parizaca. “A Revised Infrageneric Classification of Vanilla (Orchidaceae) Based on Phylogenetic, Morphological and Biogeographical Evidence”. Phytotaxa, vol. 715, no. 3, Aug. 2025, pp. 207-28, doi:10.11646/phytotaxa.715.3.2.