Examination of the persistency of milk fatty acid composition responses to plant oils in cows given different basal diets, with particular emphasis on trans-C18:1 fatty acids and isomers of conjugated linoleic acid Roy, A.; Ferlay, A.; Shingfield, K.J.; Chilliard, Y. Animal Science 82(4): 479-492 2006 https://eurekamag.com/research/013/244/013244114.php