K. THAMIZH SELVI, and K. SIVAKUMAR. 2012. “DISTRIBUTION OF HETEROCYSTOUS CYANOBACTERIA IN RICE FIELDS OF CUDDALORE DISTRICT, TAMILNADU: Life Science-Botany”. International Journal of Life Science and Pharma Research 2 (4):L30-L39. https://ijlpr.com/index.php/journal/article/view/264.