Bala, B.K., M.A. Hossain, M.A. Haque, and S. Majumder. 2012. “Ecological Footprint of the Hill Tracts of Chittagong in Bangladesh”. Oecologia Montana 21 (1), 36-41. https://om.vuvb.uniza.sk/index.php/OM/article/view/236.