Thuyen, Doan Ai, Thai Xuan Du, Do Dang Giap, and Nguyen Tang Ton. 2014. “Preliminary Study on the Micropropagation in Vitro of Black Pepper (Piper Nigrum L.)”. Academia Journal of Biology 27 (3):39-45. https://doi.org/10.15625/0866-7160/v27n3.5268.