„The Aqueous Calyx Extract of Hibiscus sabdariffa Lowers Blood Pressure and Heart Rate via Sympathetic Nervous System Dependent Mechanisms“, NJPS, let. 29, št. 2, str. 131–136, maj 2021, Pridobljeno: 16. maj 2026. [Na spletu]. Dostopno na: https://ojshostng.com/index.php/njphysiologicalsciences/article/view/1820