Leejongpermpoon, S., C. Markchun, P. Kanchanaboot, R. Kanjunda, and W. Pumkorm. “A dielectric barrier electrode of a uniform AC electric field effect on roselle root length”. RMUTSB ACADEMIC JOURNAL, vol. 6, no. 1, June 2018, pp. 65-72, https://li01.tci-thaijo.org/index.php/rmutsb-sci/article/view/124267.