Zaman, M. M., K. Nahar, T. Chowdhury, and M. A. H. Chowdhury. “Growth, Leaf Biomass Yield of Stevia and Post-Harvest Soil Fertility As Influenced by Different Levels of Poultry Manure”. Journal of the Bangladesh Agricultural University, vol. 15, no. 2, Dec. 2017, pp. 212-8, https://jbau.bau.edu.bd/index.php/home/article/view/139.