@article{huntington_magee_matthews_poore_burns_2009, title={Urea metabolism in beef steers fed tall fescue, orchardgrass, or gamagrass hays}, volume={87}, DOI={10.2527/jas.2008-1444}, number={4}, journal={Journal of Animal Science}, author={Huntington, G. B. and Magee, K. and Matthews, A. and Poore, M. and Burns, J.}, year={2009}, pages={1346–1353} }
 @article{magee_poore_burns_huntington_2005, title={Nitrogen metabolism in beef steers fed gamagrass or orchardgrass hay with or without a supplement}, volume={85}, ISBN={0008-3984}, DOI={10.4141/A04-045}, number={1}, journal={Canadian Journal of Animal Science}, author={Magee, K. J. and Poore, M. H. and Burns, J. C. and Huntington, G. B.}, year={2005}, pages={107} }