Chakraborty, Ratna. “Importance Of Using Renewable Sources Of Energy For Maintaining Ecological Sustainability In Case Of In Extreme Climate Vulnerable Zones : A Case Study Of Sagar Island Of Sundarban”. International Journal Of Management And Economics Invention, vol. 1, no. 06, Aug. 2015, pp. 247-53, https://rajournals.in/index.php/ijmei/article/view/366.