1. Adair, Eleanor R. Personal communication.
2. Alekseeva, T. T. Nervous and humeral factors in the maintenance of alimentary excitability in conjoined twins, Fiziol. zh. SSSR, 1958, 44, No. 4, 259–304.
3. Bash, K. W. Contributions to a theory of the hunger drive. J. comp. Psychol., 1939, 28, 137–160.
4. Brodish, A., & Long, C. H. H. A technique of cross-circulation in the rat which permits accurate control of blood volume transfers. Yale J. Biol. Med., 1956, 28, 644–649.
5. Hervey, G. R. The effect of lesions in the hypothalamus in parabiotic rats. J. Physiol., 1959, 145. 336–352.