1. Almeida, F.C.G. and Lemonica, I.P. (2000): The toxic effects of Coleus barbatus B. on the different periods of pregnancy in rats. J. Ethnopharmacol., 73, 53-60.
2. Burdan, F., Szumilo, J. and Klepacz, R. (2009): Maternal toxicity of nonsteroidal anti-inflammatory drugs as an important factor affecting prenatal development. Reprod. Toxicol., 28, 239-244.
3. Brugiolo S.S.S., Borges, L.V., Pimenta, D.S., Brugioro, A.S.S., Peters, V.M. and Guerra, M.O. (2009): Ethnobotany and Experimental Pharmacology of Echinodorus grandiflorus (chapéu-de-couro). In: Medicinal Plants: Classification, Biosynthesis and Pharmacology (Alejandro, V. and Jasiah, I., eds.), pp.243-254, Nova Science Publishers, New York.
4. Efficacy, safety, quality control, marketing and regulatory guidelines for herbal medicines (phytotherapeutic agents)
5. Calliari-Martin, M.R., Dietrich, S., Bortolini, C.E., Cunha, C.T. and Lorenceti, G.(2001): Embriotoxicidade da Artemisia vulgaris Linné em ratas. Revista Médica HSVP, 11, 12-17.