1. Van Hellemont, J. 1986.Compendium de Phytotherapie, 234–235. Bruxeles: Service Scientifique de l'APB.
2. Newal, C. A., Anderson, L. A. and Phillipson, J. D. 1996.Herbal medicines, A guide for health-care professionals, 179London: Pharmaceutical Press.
3. Graça, J. A.B., Henriques, J. M.L., Medina, G., Monteiro, L., Oliveira, L. C., Pereira, T. G. and Ramilo, M. T. 1996.Guia prático de remédios e tratamentos naturais, 150Lisboa: Selecções do Reader's Digest.
4. Lippia: traditional uses, chemistry and pharmacology: a review
5. Acteoside as the Analgesic Principle of Cedron (Lippia hriphylla), a Peruvian Medicinal Plant.