Rangarajan N, Sampath V, Dass Prakash M V, and Mohanasundaram S. “UV Spectrophotometry and FTIR Analysis of Phenolic Compounds With Antioxidant Potentials in Glycyrrhiza Glabra and Zingiber Officinale”. International Journal of Research in Pharmaceutical Sciences, vol. 12, no. 1, Feb. 2021, pp. 877-83, https://ijrps.com/home/article/view/424.