Verma, BC, et al. “Effect of Nutrient Management Strategies on Productivity in Rice-Pigeon Pea Intercropping under Drought Prone Rainfed Ecology of Eastern India”. ORYZA-An International Journal of Rice, vol. 59, no. 1, Apr. 2022, pp. 83-89, http://epubs.icar.org.in/index.php/OIJR/article/view/122853.