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de Vries M, Bokkers EA, Dijkstra T, van Schaik G, de Boer IJ.de Vries M, et al.J Dairy Sci. 2011 Jul;94(7):3213-28. doi: 10.3168/jds.2011-4169.J Dairy Sci. 2011.PMID: 21700006Free article.Review.
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de Vries M, Bokkers EA, van Schaik G, Engel B, Dijkstra T, de Boer IJ.de Vries M, et al.J Dairy Sci. 2014 Feb;97(2):715-30. doi: 10.3168/jds.2013-6585. Epub 2013 Dec 2.J Dairy Sci. 2014.PMID: 24290821Free article.