«The Aqueous Calyx Extract of Hibiscus sabdariffa Lowers Blood Pressure and Heart Rate via Sympathetic Nervous System Dependent Mechanisms», NJPS, bd. 29, nr. 2, s. 131–136, mai 2021, åpnet: 25. april 2026. [Online]. Tilgjengelig på: https://ojshostng.com/index.php/njphysiologicalsciences/article/view/1820