Ly, Huong, and Huong Nguyen. 2014. “Plackett-Burman Matrix and Response Surface Methodology-Central Composite Design for Optimization of Lactobacillus Acidophilus Biomass Production”. Science and Technology Development Journal 17 (2), 60-72. https://doi.org/https://doi.org/10.32508/stdj.v17i2.1360.