Publication 23: http://www.sciencedirect.com/science/article/pii/S0044848606007344
Publication 26: http://www.journalofdairyscience.org/article/S0022-0302%2808%2970996-2
Publication 29: http://www.sciencedirect.com/science/article/pii/S1537511009000385
Publication 30: http://www.journalofdairyscience.org/article/S0022-0302%2809%2970547-8
Publication 33: http://www.sciencedirect.com/science/article/pii/S1871141310005871