Smitha, K., & Sunojkumar, P. (2015).

Notes on the Identity and distribution of Plectranthus subincisus (Lamiaceae)—a poorly known species recollected after 150 years in southern India

. Phytotaxa, 192(2), 105–111. https://doi.org/10.11646/phytotaxa.192.2.3