To Uyen, Do Thi, Tran Van Nhi, Nguyen Ngoc Dung, and Diethelm Kleiner. 2015. “Utilization of Several Nitrogen Sources by Photosynthetic Bacteria Isolated in Vietnam”. Academia Journal of Biology 25 (3):98-104. https://doi.org/10.15625/0866-7160/v25n3.6845.