Verma, S., A. Singh, S. S. Pradhan, J. Singh, and S. Verma. “Effects of Organic Formulations and Synthetic Fertilizer on the Performance of Pigeonpea in Eastern Region of Uttar Pradesh”. Bangladesh Journal of Botany, vol. 47, no. 3, Oct. 2018, pp. 467-71, doi:10.3329/bjb.v47i3.38713.