Ahmed, K., M. Khatun, S. Pramanik, A. Nargis, N. Dey, and K. Dey. “Effect of Plant Extracts on the Yield of Soybean Crop Under Different Climatic Conditions”. Bangladesh Journal of Scientific and Industrial Research, vol. 41, no. 1, Aug. 2007, pp. 73-76, doi:10.3329/bjsir.v41i1.272.