Hossain, M. A., M. Mannan, and M. A. Hossain. “Primary Productivity Estimation in Relation to Trophic Status in Altadighi in Naogaon District, Bangladesh”. University Journal of Zoology, Rajshahi University, vol. 22, June 2007, pp. 41-45, https://banglajol.info/index.php/UJZRU/article/view/88.