‘The Aqueous Calyx Extract of Hibiscus sabdariffa Lowers Blood Pressure and Heart Rate via Sympathetic Nervous System Dependent Mechanisms’, NJPS, vol. 29, nr. 2, pp. 131–136, mei 2021, Geraadpleegd: 4 april 2026. [Online]. Beschikbaar op: https://ojshostng.com/index.php/njphysiologicalsciences/article/view/1820