Duong, O. “IMPROVING NUTRIENT FORMULATION FOR CULTURE OF (Spirulina Platensis) TO REPLACE THE TRADITIONAL ZARROUK IN TERMS OF ECONOMIC ASPECT IN TRA VINH”. TRA VINH UNIVERSITY JOURNAL OF SCIENCE, Vol. 8, no. 29, Mar. 2018, pp. 53-58, doi:10.35382/18594816.1.29.2018.32.