Tawfik, Wafaa A., Khaled A. Shams, Nahla S. Abdel-Azim, Nahed M. Hassan, and Shams I. Ismail. 2006. “NAPHTHAQUINONES OF ALKANNA ORIENTALIS (L.) BOISS”. African Journal of Traditional, Complementary and Alternative Medicines 4 (1):55-58. https://journals.athmsi.org/index.php/ajtcam/article/view/158.