Kulhare, P S, et al. “Response of Late-Sown Wheat (Triticum Aestivum) and Soybean (Glycine Max) to Fresh, Residual and Cumulative Sulphur Levels on Deep Vertisol”. The Indian Journal of Agricultural Sciences, vol. 65, no. 8, June 2012, https://epubs.icar.org.in/index.php/IJAgS/article/view/18968.