References
- Auckland , J. N. and Fulton , R. B. 1973 . Effects of restricting the energy intake of laying hens . Br. Poult. Sci. , 14 : 579 – 588 .
- Auckland , J. N. and Wilson , S. B. 1975 . Effects of moderate energy restriction on light and medium hybrid laying hens . Br. Poult. Sci. , 16 : 23 – 29 .
- Sykes , A. H. 1972 . “ The energy cost of egg production. ” . In Egg Formation and Production , Edited by: Freeman , B. M. and Lake , P. E. 187 – 196 . Edinburgh : British Poultry Science Ltd. .