”The Aqueous Calyx Extract of Hibiscus sabdariffa Lowers Blood Pressure and Heart Rate via Sympathetic Nervous System Dependent Mechanisms”, NJPS, vol. 29, nr 2, s. 131–136, maj 2021, åtkomstdatum: 16 maj 2026. [Online]. Tillgänglig vid: https://ojshostng.com/index.php/njphysiologicalsciences/article/view/1820