6Enayatifard R,Asgarirad H, Kazemi-Sani B. Microbialquality of some herbal solid dosage forms [J]. Afr JBiotechnol, 2010, 9(10): 1701-1705.
7Alwakeel S S. Microbial and heavy metals contaminationof herbal medicines [J]. Res J Microbiol, 2008,3(12):683-691.
8Czech E,Kneifel W, Kopp B. Microbiological status ofcommercially available medicinal herbal drugs-ascreening study [J]. Planta Med, 2001, 67(3): 263-269.