SINGH, SHER, et al. “Evaluation of Maize (Zea Mays) Based Intercropping for Productivity, Resource-Use Efficiency and Competition Indices in the Rainfed Foothills of Northwest Himalayas”. The Indian Journal of Agricultural Sciences, vol. 85, no. 5, May 2015, pp. 614-21, https://doi.org/10.56093/ijas.v85i5.48431.