Bakthir, Hussein, Nasser A. Awadh Ali, N. Arnold, A. Teichert, and L. Wessjohann. 2011. “ANTICHOLINESTERASE ACTIVITY OF ENDEMIC PLANT EXTRACTS FROM SOQOTRA”. African Journal of Traditional, Complementary and Alternative Medicines 8 (3):296-99. https://athmsi.org/journals/index.php/ajtcam/article/view/1280.