SRIVASTAVA, B K, et al. “Effect of Integrated Nutrient Management on the Performance of Crops under Brinjal (Solanum Melongena) – Pea (Pisum Sativum) – Okra (Hibuscus Esculentus) Cropping System”. The Indian Journal of Agricultural Sciences, vol. 79, no. 2, Jan. 2011, https://epubs.icar.org.in/index.php/IJAgS/article/view/2433.