Anderson, B. 1971. Thirst- and brain control of water balance. Am. Scient. 59:408-415.
Attebery, J. T. and H. D. Johnson. 1969. Effects of environmental temperature, controlled feeding and fasting on rumen motility. J. Anim. Sci. 29:734-737.
Blaxter, K. L., N. McC. Graham, F. W. Wainman and D. G. Armstrong. 1959. Environmental temperature, energy metabolism and heat regulation in sheep. II. The partition of heat losses in closely clipped sheep. J. Agric. Sci. (Cambridge) 52:25-40.
Church, D. C. 1976. Motility of the gastro-intestinal tract. In: Digestive Physiology and Nutrition of Ruminants. Vol. 1 (Ed. D. C. Church). New York, O and B Books, Inc. pp. 69-98.
Colditz, P. J. and R. C. Kellaway. 1972. The effect of diet and heat stress on feed intake, growth, and nitrogen metabolism in Friesian, $F_1$
Friesian, and Brahman heifers. Aust. J. Agric. Res. 23:715-725.
Colvin, H. W., R. D. Digesti and J. A. Louvier. 1978. Effect of succulent and nonsucculent diets on rumen motility and pressure before, during and after eating. J. Dairy Sci. 61:1414-1421.
Gregory, P. C. 1984. Control of intrinsic reticulo-ruminal motility in the vagotomized sheep. J. Physiology. 225:309-338.
Guyton, A. C. and J. E. Hall. 1996. Central nervous system centers for thirst. In: Textbook of Medical Physiology. 9th Ed. W.B. Saunders Company, Philadelphia, Pennsylvania, p. 361.
Kamal, T. H., O. Shehata and I. M. Elbanna. 1972. Effect of heat and water restriction on water metabolism and body fluid compartments in farm animals. In: Isotope Studies on the Physiology of Domestic Animals. International Atomic Energy Agency, Vienna, pp. 95-102.
Leek, B. F. and R. H. Harding. 1974. Sensory nervous receptors in the ruminant stomach and the reflex control of reticulo-ruminal motility. In: Digestion and Metabolism in the Ruminant (Ed. I. W. McDonald and A. C. I. Warner). The University of New England Press, Armidale, Australia pp. 60-76.
McDowell, R. E., E. G. Moody, F. J. Van Soest, R. P. Lehmann and G. L. Ford. 1969. Effect of heat stress on energy and water utilization of lactating cows. J. Dairy Sci. 52:188-194.
Pharr, L. D., H. W. Jr. Colvin and P. R. Noland. 1967. Rumen motility of sheep as affected by the physical form of oat hay. J. Anim. Sci. 26:414-417.
Tsuda, T. 1994. Digestion and absorption. In: Animal Physiology. (Ed. T. Tsuda). Youkendo, Tokyo, pp. 161-162.
Reid, C. S. W. 1963. Diet and the motility of the forestomachs of the sheep. Proc. NZ Soc. Anim. Prod. 23:169-188.
Sunagawa, K., H. Takahashi, Z. Kojiya and F. Hongo. 1988. Net absorption amounts of volatile fatty acids in goats exposed to a heat environment. Jpn. J. Zootech. Sci. 59:787-792.
Sunagawa, K., T. Senshu, H. Matsuda. H. Takahashi, Z. Kojiya and F. Hongo. 1989. Effects of a heat environment on the disappearance of feed fractions from nylon bags incubated in the rumen of sheep. Asian-Aus. J. Anim. Sci. 2:384-385.
Sunagawa, K., H. Takahashi, Y. Iseki, M. Higashi, S. Umeda, H. Yamashiro, F. Nakamatsu, H. Akutsu, F. Hongo, A. Shinjo, S. Shiroma and Y. Kawashima. 1996. Effects of excessive water intake on net absorption of volatile fatty acids in goats exposed to hot environment. Anim. Sci. Technol. (Jpn.) 67:893-899.
Sunagawa, K., M. Sakurada, H. Takahashi, F. Hongo, A. Shinjo and S. Shiroma. 1997. The ruminal concentrations of volatile fatty acids and digestibility of the feed fractions in goats exposed to a hot environment. Anim. Sci. Technol. (Jpn). 68:156-162.
Warren, W. P., F. A. Martz, K. H. Assay, E. S. Hilderbrand, C. G. Payne and J. R. Vogt. 1974. Digestibility and rate of passage by steers fed tall fescue, alfalfa and orchardgrass hay in 18 and 32 C ambient temperature. J. Anim. Sci. 39:93-96.
Wyburn, R. S. 1980. The mixing and propulsion of the stomach contents of ruminants. In: Digestive Physiology and Metabolism in Ruminants (Ed. Y. Ruckebusch and P. Thivend). MTP Press, Lancaster, UK, pp. 35-51.