@article{Penner2011,
author = {Penner, G. B. and Steele, M. A. and Aschenbach, Jörg R. and McBride, B. W.},
year = {2011},
language = {eng},
copyright = {http://journalofanimalscience.org/site/misc/ifora.xhtml},
title = {Ruminant Nutrition Symposium},
url = "http://dx.doi.org/10.17169/refubium-19645",
}