«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), сс. 131–136. доступно на: https://www.ojshostng.com/index.php/njphysiologicalsciences/article/view/1820 (просмотрено: 21 май 2026).