Ezzat, N., نهال, S. A. Abood, and ساجدة. “Isolation and Partial Purification of the Clotamine Synthetase from the Black Bean Plant (Nigella Sativa L.)”. Journal of Education and Science (JES), vol. 22, no. 1, Mar. 2009, pp. 84-95, doi:10.33899/edusj.2009.57421.