Saeed B O, Atabani G S, Nawwaf A, Nasr A M, Abdulhadi N H, Abu-Zeid Y A, Alrasoul M A, Bayoumi R A
Department of Biochemistry, Faculty of Medicine, University of Khartoum, Sudan.
Trans R Soc Trop Med Hyg. 1990 May-Jun;84(3):349-50. doi: 10.1016/0035-9203(90)90312-3.