SHANBHAG, D., and SUNITA JAYARAMAN. “Application of HPTLC in Standardization of Homoeopathic Mother Tincture Andrographis Paniculata and Its Comparison With Market Products”. Asian Journal of Chemistry, vol. 20, no. 1, Mar. 2010, pp. 509-13, https://asianpubs.org/index.php/ajchem/article/view/19457.