Suddee S, Paton AJ, Parnell JAN (2005) Taxonomic Revision of Tribe Ocimeae Dumort. (Lamiaceae) in Continental South East Asia III. Ociminae. Kew Bulletin 60(1): 3-75. Retrieved from http://www.jstor.org/stable/4110885
There is no corrections for Platostoma calcaratum var. garrettii yet.