Prommetta, P., L. Phivthong-ngam, C. Chaichantipyuth, N. Niwattisaiwong, and S. Lawanprasert. “Effects of Hibicus Sabdariffa Extract on Clinical Blood Chemistry in Rats”. Journal of Basic and Applied Pharmacology, vol. 27, no. 1, July 2015, p. 56, https://li01.tci-thaijo.org/index.php/JBAP/article/view/37266.