Hossain, Farzana, et al. “Carbon Economy and Heavy Metal Contamination in Two Peri-Urban Areas of Dhaka City in Relation to Indigenous Vegetable Cultivation Practices”. Bangladesh Journal of Scientific Research, vol. 23, no. 2, Nov. 2011, pp. 103-14, https://www.banglajol.info/index.php/BJSR/article/view/9004.