<p>Sun X. Z., Waghorn G. C., Hoskin S. O., Harrison S. J.,&nbsp;Muetzel S., Pacheco D. 2012. Methane emissions from&nbsp;sheep fed fresh brassicas (Brassica spp.) compared to perennial ryegrass (Lolium perenne). Animal Feed Science and Technology, 176, 107-116.</p>
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