Piper sarmentosum increases nitric oxide production in oxidative stress: a study on human umbilical vein endothelial cells / Azizah Ugusman, Zaiton Zakaria, Chua Kien Hui, Nor Anita Megat Mohd Nordin // CLINICS 2010; 65(7) — pp. 709-14 — url [Архівовано 20 грудня 2016 у Wayback Machine.]
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Piper sarmentosum increases nitric oxide production in oxidative stress: a study on human umbilical vein endothelial cells / Azizah Ugusman, Zaiton Zakaria, Chua Kien Hui, Nor Anita Megat Mohd Nordin // CLINICS 2010; 65(7) — pp. 709-14 — url [Архівовано 20 грудня 2016 у Wayback Machine.]
