„The Aqueous Calyx Extract of Hibiscus sabdariffa Lowers Blood Pressure and Heart Rate via Sympathetic Nervous System Dependent Mechanisms“, NJPS, sv. 29, izd. 2, str. 131–136, svi. 2021, Pristupljeno: 11. lipanj 2026. [Na internetu]. Dostupno na: http://ojshostng.com/index.php/njphysiologicalsciences/article/view/1820