พลเชี่ยว ฉ. “Modification of Carbon Paste Electrode With Hemin/Polypyrrole for Nitrite Determination in Drinking Water”. Progress in Applied Science and Technology, vol. 3, no. 2, Nov. 2013, pp. 38-44, https://ph02.tci-thaijo.org/index.php/past/article/view/243232.