Hung, Nguyen Khac, Pham Bich Ngoc, Nguyen Thi Thu Hien, Nguyen Thi Thuy Huong, Do Thi Gam, Le Duy Hung, and Chu Hoang Ha. 2016. “Study on the Effects of Led Light on Physiological and Morphological Characteristics of Dang Shen (Codonopsis sp.) Growth in in Vitro Condition”. Academia Journal of Biology 38 (2):220-27.