Bala, B.K., M.A. Hossain, M.A. Haque, and S. Majumder. “Ecological Footprint of the Hill Tracts of Chittagong in Bangladesh”. Oecologia Montana 21, no. 1 (June 30, 2012): 36-41. Accessed August 25, 2019. https://om.vuvb.uniza.sk/index.php/OM/article/view/236.