2Malacarne M, Martuzzi F, Summer A.et a l .Protein and fat composition of mare' s milk: some nutritional remarks with reference to human and cow's milk. J. International Dairy Journal 2002, 12: 869- 877.
3FOX P F.Dairy Chemistry and Biochemistry.M. Ireland.Published by Blackie Academic&Professional, 1998: 13-14.