Sirag, N., 		MM, E., 		Algaili, A., & 		Ohaj, M.
2014 Jun  1.  Determination of Total Phenolic Content and Antioxidant Activity of Roselle (Hibiscus sabdariffa L.) Calyx and Epicalyx Ethanolic (Alcoholic) Extract. Gezira Journal of Health Sciences. [Online] 10:1