Gafur, MA, and Soltana Parvin. “Distribution of Blue-Green Algae in Soils of Chittagong University Campus and Their Nitrogen Fixing Capacity”. Bangladesh Journal of Botany 37, no. 1 (November 5, 2008): 49–53. Accessed April 28, 2024. https://www.banglajol.info/index.php/BJB/article/view/1563.