SIRAG, Nizar et al.
Determination of Total Phenolic Content and Antioxidant Activity of Roselle (Hibiscus sabdariffa L.) Calyx and Epicalyx Ethanolic (Alcoholic) Extract.
مجلة الجزيرة للعلوم الصحية, [S.l.], v. 10, n. 1, june 2014.
ISSN 1810-5386. متوفر في: <http://journals.uofg.edu.sd/index.php/gjhs/article/view/337>. تأريخ الوصول: 30 june 2026.