«The Aqueous Calyx Extract of Hibiscus sabdariffa Lowers Blood Pressure and Heart Rate via Sympathetic Nervous System Dependent Mechanisms» (2021) Nigerian Journal of Physiological Sciences, 29(2), pp. 131–136. Disponibile su: https://www.ojshostng.com/index.php/njphysiologicalsciences/article/view/1820 (Consultato: 5 aprile 2026).