Kim Qui, T., T. Hoang, N. Thuy Nhi, and N. Thi Ngoc. “A NOVEL EXTRACTION METHOD OF VINDOLINE AND CATHARANTHINE FROM THE CATHARANTHUS ROSEUS G.DON (APOCYNACEAE)”. Science and Technology Development Journal, Vol. 1, no. 5, May 1998, pp. 29-33, doi:https://doi.org/10.32508/stdj.v1i5.3731.