Puapermpoonsiri, Pichai. “Comparison of Xylocaine with Adrenaline and Cocaine in the Nasal Endoscopy: a Randomized Double Blind Controlled Trial”. Vajira Medical Journal : Journal of Urban Medicine 55, no. 1 (September 29, 2011): 3–8. accessed September 20, 2026. https://he02.tci-thaijo.org/index.php/VMED/article/view/476.