Chowdhury, F. J., et al. “Effects of Biogas Plant Residues and NPK Fertilizers on Growth and Nutritional Quality of Amaranth (Amaranthus Tricolor L.)”. International Journal of Bio-Resource and Stress Management, vol. 8, no. Feb, 1, June 2023, pp. 096-03, https://ojs.pphouse.org/index.php/IJBSM/article/view/1077.