Xuan, Bui Thi, Duc Loi, Vu, Minh Ngoc, Tran, Duc Canh, Vu, AND Bich Thuy, Tran. " The Analgesic Effect of Extracts and Fractions of Sanchezia nobilis Hook.f. Leaves" VNU Journal of Science: Medical and Pharmaceutical Sciences [Online], Volume 34 Number 2 (24 December 2018)