P. Ngo Hoang and B. Trang Viet, “A PRELIMINARY STUDY FOR THE ANALYSIS OF GENETIC VARIATION BETWEEN MANIHOT GLAZIOVII MUEL-ARG AND SOME CULTIVARS OF CASSAVA (M. ESCULENTA CRANTZ) USING PCR-RAPD”, Science and Technology Development Journal, vol. 7, no. 7, pp. 31-36, Jul. 2004.