Awad, Enas M., 		Sirag, Nizar, 		Awadallah, Alla, AND 		Ahmed, Elhadi M..
" Investigation of Anti-nociceptive Activity of Neem (Azadirachta indica) A. Juss on Acetic Acid Induced Writhing in Rats" <em>Gezira Journal of Health Sciences</em> [Online], Volume 10 Number 1 (1 June 2014)