Sireeratawong, S., A. Itharat, P. Khonsung, N. Lertprasertsuke, and K. Jaijoy. “TOXICITY STUDIES OF THE WATER EXTRACT FROM THE CALYCES OF HIBISCUS SABDARIFFA L. IN RATS”. African Journal of Traditional, Complementary and Alternative Medicines, vol. 10, no. 4, Apr. 2013, pp. 122-7, https://athmsi.org/journals/index.php/ajtcam/article/view/1593.