ELOFF, J. The major differences in chemical composition and antibacterial activity of two closely related Leonotis species (Lamiaceae) may have taxonomic value. Suid-Afrikaans Tydskrif vir Natuurwetenskap en Tegnologie / <i>South African Journal of Science and Technology</i&gt;, v. 29, n. 1, p. 30-38, 13 jan. 2010.