Pham Thi Kim Thanh, Nguyen Trong Quang, Nguyen Thi Nguyet, and Nguyen Thi Chuc. “EXTRACT ESSENTAIL OIL OF CYMOPOGON CITRATUS, ANALYSE CHEMICAL COMPOSITION AND INCREASING CONTENT OF GOOD INGREDIENTS IN ESSENTIAL OIL OF CYMOPOGON CITRATUS BY USING DISTILLING TOWER”. UTEHY Journal of Applied Science and Technology, Vol. 14, July 2017, pp. 86-89, http://jst.utehy.edu.vn/index.php/jst/article/view/192.