S O, F.H A, H H, N.H F, M B. Enzymatic Esterification of Betulinic Acid. Malaysian J. Sci. [Internet]. 2005 Jan. 31 [cited 2024 Dec. 22];24(1):97-8. Available from: https://juku.um.edu.my/index.php/MJS/article/view/8937