1. Evaluvation of artificially dried grass as a source of energy for sheep:II. The energy value of cocksfoot, timothy and two strains of rye-grass at varying stages of maturity
2. Blaxter, K. L. 1962.The energy metabolism of ruminants., 1. Aufl., 185–213. London: Hutchinson & Co.
3. Brouwer, E., van Es, A. J. H. and Nijkamp, H. J. 1965.Further investigations on early and late cut hay with some remarks on the design of difference trials205–216. 3. Symposium on energy metabolism. EAAP-Publ. No. 11
4. Flatt, W. P., Coppock, C. E. and Moore, L. A. 1965.Energy balance studies with lactating, non-pregnant dairy cows consuming rations with varying hay to grain ratios121–130. 3. Symposium on energy metabolism. EAAP-Publ. No. 11