Masta, S., S. Singh, D. Prajapati, and P. Agnihotri. “Lectotypification and Taxonomic Notes on Orthosiphon incurvus (Lamiaceae, Nepetoideae)”. Phytotaxa, vol. 758, no. 2, May 2026, pp. 191-6, doi:10.11646/phytotaxa.758.2.8.