Thu, Dang, Huong, Le, Nghia, Tran, AND Tung, Bui. " Inhibitory Effect of the Leaf of Psidium guajava Grown in Vietnam on α-Glucosidase and Protein Tyrosine Phosphatase 1B in vitro" VNU Journal of Science: Medical and Pharmaceutical Sciences [Online], Volume 35 Number 1 (21 June 2019)