Uttam Rakesh, Sachin, et al. “Quantitative Estimation of Gallic Acid From Hydroalcoholic Extract of Dried Flowers of Nymphaea Stellata, Willd by RP-HPLC”. Asian Journal of Chemistry, vol. 22, no. 8, June 2010, pp. 5919-24, https://asianpubs.org/index.php/ajchem/article/view/11875.