H.  Passinho-Soares, Felix, D., Kaplan, M. Auxiliador, Margis-Pinheiro, M., and Margis, R., ?Authentication of medicinal plant botanical identity by amplified fragmented length polymorphism dominant DNA marker: inferences from the Plectranthus genus?, Planta Med, vol. 72, pp. 929?31, 2006.

E. J.  LEWIS and FRIEDRICH, E. C., ?THE ESSENTIAL OIL OF POLIOMINTHA-INCANA?, Planta Med, vol. 56, pp. 224?226, 1990.