N.K. CHOPRA and NISHA CHOPRA (2001) “Evaluation of tillage system and herbicides on wheat (Triticum aestivum) performance under rice (Oryza sativa)-wheat (Triticum aestivum) cropping system”, Indian Journal of Agronomy, 55(4), pp. 304–307. doi:10.59797/ija.v55i4.4756.