References
- Ookawa , T. and Gotoh , J. 1964 . Electroencephalographic study of chickens: Periodic recurrence of low voltage and fast waves during behavioural sleep . Poult. Sci. , 43 : 1603 – 1604 .
- Ookawa , T. and Gotoh , J. 1965 . Electroencephalogram of the chicken recorded from the skull under various conditions . J. comp. Neurol. , 124 : 1 – 14 .
- Ookawa , T. and Takogi , K. 1968 . Electroencephalograms of free behavioural chicks at various developmental ages . Jap. J. Physiol. , 18 : 87 – 99 .
- Richardson , A. J. 1970 . The role of the crop in the feeding behaviour of the domestic chicken . Anim. Behav. , 18 : 633 – 639 .
- Sterrit , G. M. and Kienholz , E. 1967 . Chronic pump feeding of Leghorn chicks via implanted oesophageal tubes . J. appl. Physiol. , 23 : 71 – 74 .
- Timofeev , N. N. 1957 . On the comparative physiology of exteroceptive and interoceptive conditioned reflexes . Sechenov. physiol. J. USSR , 43 : 236 – 242 .