https://www.journalofdairyscience.org/article/S0022-0302(82)82191-7/pdf
https://www.sciencedirect.com/science/article/pii/B9780123969880000143
https://www.sciencedirect.com/science/article/pii/B9780123969880000143
https://www.sciencedirect.com/science/article/abs/pii/S0011393X05807738