Hartati, Rika, et al. “CHEMICAL COMPOSITION AND ANTIMICROBIAL ACTIVITY OF DITERPENE AND ESSENTIAL OILS OF Hedychium Roxburghii BL. RHIZOME”. Asian Journal of Pharmaceutical and Clinical Research, vol. 8, no. 5, Sept. 2015, pp. 209-14, https://www.journals.innovareacademics.in/index.php/ajpcr/article/view/7348.