Kangping Xu et al.
Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica, 34(11), 1384-1389 (2009-09-24)
To develop an HPLC method for the quantification of six active components in three species (Swertia davidi, S. nervosa and S. mussotii) . The determination was performed on a Hypersil BDS colunm (4. 6 mm x 200 mm, 5 microm).