Estimation of boswellic acids from market formulations of Boswellia serrata extract and 11-keto-β-boswellic acid in human plasma by high-performance thin-layer chromatography - Shah, S A; Rathod, I S; Suhagia, B N; Patel, D A; Parmar, V K; Shah, B K; Vaishnavi, V M (J Chromatogr B Analyt Technol Biomed Life Sci, 2007)