Klinchaeam, S., P. Nivesrangsan*, and M. Lokitsangthong. “Condition Monitoring of a Small Four-stroke Petrol Engine using Vibration Signals”. CURRENT APPLIED SCIENCE AND TECHNOLOGY, vol. 9, no. 1, Mar. 2018, pp. 9-17, https://li01.tci-thaijo.org/index.php/cast/article/view/137222.