MISHRA, J S, and V P SINGH. “Competitive Ability of Wheat (Triticum Aestivum) Cultivars Against Wild Oat (Avena Ludoviciana) Infestation under Zero Tillage”. The Indian Journal of Agricultural Sciences, vol. 78, no. 10, Jan. 2011, https://epubs.icar.org.in/index.php/IJAgS/article/view/2701.