Gao, J. et al. 2008. Validation of a HPLC method for flavonoid biomarkers in skullcap (Scutellaria) and its use to illustrate wide variability in the quality of commercial tinctures. Journal of Pharmacy & Pharmaceutical Sciences. 11, 1 (Mar. 2008), 77–87. DOI:https://doi.org/10.18433/J39G6V.