Saha, Ruby, et al. “Effect of Crop Diversification in Rice (Oryza sativa)–wheat (Triticum Aestivum) Cropping System on System Productivity, Economics and Soil Health”. The Indian Journal of Agricultural Sciences, vol. 82, no. 8, Aug. 2012, pp. 717–20, https://doi.org/10.56093/ijas.v82i8.23061.