Ramanjaneyulu, A. V., et al. “Biofertilizers, Nitrogen and Phosphorus on Yield and Nutrient Economy in Forage Sorghum Affected by Nutrient Management in Preceding Mustard”. International Journal of Bio-Resource and Stress Management, vol. 1, no. Sep, 2, Sept. 2010, pp. 66-68, https://ojs.pphouse.org/index.php/IJBSM/article/view/58.