Srirugsa, Tanawat, Wittaya Wongklang, Suppakit Eiadtrong, and Prathan Srichai. 2021. “Ethanol on Port Fuel Injection Engine in Motorcycle Engine”. Princess of Naradhiwas University Journal 13 (3):211-28. https://li01.tci-thaijo.org/index.php/pnujr/article/view/250837.