„The Aqueous Calyx Extract of Hibiscus sabdariffa Lowers Blood Pressure and Heart Rate via Sympathetic Nervous System Dependent Mechanisms“, NJPS, sv. 29, izd. 2, str. 131–136, svi. 2021, Pristupljeno: 25. travanj 2026. [Na internetu]. Dostupno na: https://ojshostng.com/index.php/njphysiologicalsciences/article/view/1820