Singh, Umeed, et al. “Production Potential, Biological Feasibility and Economic Viability of Maize (Zea Mays)-Based Intercropping Systems under Rainfed Conditions of Kashmir Valley”. The Indian Journal of Agricultural Sciences, vol. 78, no. 12, Dec. 2008, https://epubs.icar.org.in/index.php/IJAgS/article/view/9971.