ALOK KUMAR, et al. “Intensification and Diversification in Rice (Oryza sativa)wheat (Triticum Aestivum) Cropping System for Sustainability”. Indian Journal of Agronomy, vol. 57, no. 4, Oct. 2001, pp. 319-22, https://doi.org/10.59797/ija.v57i4.4655.