Lee, K.J., et al. “Analysis of Isoliquiritin and Isoliquiritigenin from Insampaedoksan Fermented by Lactobacillus Plantarum 144 Using RP-HPLC”. Asian Journal of Chemistry, vol. 26, no. 8, Apr. 2014, pp. 2425-8, doi:10.14233/ajchem.2014.16154.