KUMAR, SANTOSH, et al. “Effect of Nitrogen and Sulphur on Growth, Yield and Nutrient Uptake by Indian Mustard (Brassica Juncea) under Rainfed Condition*”. The Indian Journal of Agricultural Sciences, vol. 79, no. 2, Jan. 2011, https://epubs.icar.org.in/index.php/IJAgS/article/view/2470.