Thaniarasu, R., T. S. Kumar, and M. Rao. “In Vitro Propagation of Plectranthus Bourneae Gamble? An Endemic Red Listed Plant”. Plant Tissue Culture and Biotechnology, vol. 25, no. 2, Jan. 2016, pp. 273-84, doi:10.3329/ptcb.v25i2.26260.