Doyle et al., 1990. Anim. Feed Sci. Technol., 29, 29-43 Document reference Doyle, P. T. ; Panday, S. B, 1990. The feeding value of cereal straws for sheep. III. supplementation with minerals or minerals and urea. Anim. Feed Sci. Technol., 29, 29-43Web http://www.sciencedirect.com/science/article/pii/037784019090091LCitation key Doyle et al., 1990