Hien Tran, T.; Cam Quyen Ngo, T.; Duy Ngo, H.; Huu Thuan Anh, N.; Nu Thuy An, T.; Minh Quan, P.; Quoc Toan, T. Optimization of Essential Oil Extraction Process of White Pepper (Piper Nigrum L.) Harvested in Phu Quoc Island, Kien Giang Province, Vietnam. ajc 2020, 32, 2707-2712.