| 1 | 1. Baile, C. A., M. A. Della-FeraGarnsworthy, P. C. 1988. Physiology of control of food intake and regulation of energy balance in dairy cows. in Nutrition and lactation of dairy cow. p 251-261. Ed: Philip C. Garnsworthy.ISBN 0-408-00717-6 printed and bound in England by Anchor-Brendon Ltd., Tiptree, Essex |
| 2 | 2. Modelling Nutrient Digestion and Utilisation in Farm Animals. Ed: D. Souvant, J. Van Milgen, P. Faverdin, N. Friggens ISBN 978-90-8686-156-9. 2011 Wagenigen Academic publishers P.O. Box 220 6700 AE Wageningen The Netherlands |
| 3 | 3. Voluntary feed intake and diet selection in farm animals second edition 2007 Ed. Forbes. J. M. ISBN 978-1-845932794 printed UK by Biddles Ltd, Kings Lynn |
| 4 | 4. The welfare of cattle Rushen J, Passille, A. M., von KeyserlingkM. A. G., Weary, D. M. Published by Springer P.O. Box 17, 3300 Dordrecht, The Netherlands ISBN 978-1-4020-6557 |