Vinayagamoorthi, Vasanth, et al. “Nexus Between Profitability and Environmental Performance of Indian Firms – An Analysis With Granger Causality”. International Journal of Energy Economics and Policy, vol. 5, no. 2, Apr. 2015, pp. 433-9, https://econjournals.com.tr/index.php/ijeep/article/view/1091.