F. . Shamsa, E. . Souri, M. . Sharifzadeh, H. Jalalizadeh, and P. . Farzami, “Determination of Glycyrrhetic Acid in Rat Plasma by HPLCAfterOral Administration of Licorice Aqueous Extract: Detection of glycerrhetic acid in rat serumwas”, Iran J Pharm Sci, vol. 3, no. 1, pp. 51–56, Jan. 2007.