References
- WHO . 1998 . Quality Control Methods for Medicinal Plant Materials , Geneva : World Health Organization .
- Ronse , A. 2001 . A revision of Otacanthus Lindl. (Scrophulariaceae) . Brittonia , 53 : 137 – 153 .
- Lorenzi , H. 1999 . Plantas Ornamentais no Brasil, , 2. ed. , Nova Odessa , SP : Instituto Plantarum . rev. e ampl
- Anderson , R. G. 2004 . Brazilian Snapdragon (Otacanthus azureus) for the Cut Flower Market Foriculture Research Report 15–04, http://www.uky.edu/Ag/horticulture
- Ronse , A. , De Pooter , H. and De Proft , M. 1997 . Essential Oils of Otacanthus . Phytochemistry , 46 : 1365 – 1368 .
- Adams , R. P. 1995 . Identification of Essential oil Components by Gas Chromatography/Mass Spectrometry , Carol Stream , IL : Allured Publ Corp. .