1. Tables of feeds used in France;Andrieu,1989
2. Measurement of forage intake;Burns,1994
3. Casasús, I., Albanell, E., 2010. The use of polyethyleneglycol as a marker of fecal output in cows feed hay at two feeding levels. In: Book of Abstracts of the 61st Annual Meeting of the European Association for Animal Production. Wageningen Academic Publishers, Wageningen, pp. 222.
4. Excretion of chromium sesquioxide and polyethyleneglycol by dairy cows;Corbett;Br. J. Nutr.,1958
5. The use of polyethylene glycol to reduce the anti-nutritional effects of tannins in goats fed woody species;Decandia;Small Ruminant Res.,2000