Yadav, Satya Prakash, et al. “Chemical Composition and Macro and Micro Mineral Profile of Crop Residues Based Livestock Feed Ingredients in the Gangetic Plains of Varanasi, India”. International Journal of Livestock Research, vol. 9, no. 1, Jan. 2019, pp. 262-70, http://ijlr.org/ojs_journal/index.php/ijlr/article/view/1420.