Amor, J. J. 1994. [Diurnal patterns of intake and rumination in sheep as affected by different factors]. Tesis doctoral, Universidad de Leon.
Ash, R. H. and Dobson, A. 1963. The effect of absorption on the activity of rumen contents. Journal of Physiology 169: 39–61.
Association of Official Analytical Chemists. 1980. Official methods for analysis of the Association of Official Analytical Chemists, 13th ed. Association of Official Analytical Chemists, Washington, DC.
Dhanoa, M. S. 1988. On the analysis of dacron bag data for low degradability feeds. Grass and Forage Science 43: 441–444.
France, J., Thornley, J. H. M., López, S., Siddons, R. C., Dhanoa, M. S., Van Soest, P. J. and Gill, M. 1990. On the two-compartment model for estimating the rate and extent of feed degradation in the rumen. Journal of Theoretical Biology 146: 269–287.
Frutos, P., Revesado, P. R., Mantecón, A. R., González, J. S. and Carro, M. D. 1992. Proportion of digestive tract: a comparison of two Spanish sheep genotypes (Churra vs. Merina). Nutrition Clinique et Métabolisme 6:173–174.
Giráldez, F. J., López, S., González, J. S. and Mantecón, A. R. 1994. Comparative digestibility of fresh herbage cut at two maturity stages by two breeds of sheep. Animal Production 58: 452–453.
Givens, D. I. and Moss, A. R. 1994. Effect of breed, age and body condition of sheep on the measurements of apparent digestibility of dried grass. Animal Feed Science and Technology 46:155–162.
Goering, H. K. and Van Soest, P. J. 1970. Forage fiber analysis (apparatus, reagents, procedures and some applications). Agricultural handbook no. 379, Agricultural Research Service, United States Department of Agriculture, Washington DC.
Grovum, W. L. and Williams, V. J. 1973. Rate of passage of digesta in sheep. 3. Differential rates of passage of water and dry matter from the reticulo-rumen, abomasum and caecum and proximal colon. British Journal of Nutrition 30: 231–240.
Harmeyer, J. 1965. Zur Methodik experimenteller Untersuchungen an Pansenprotozoen. Zentralblatt fur Veterinarmedezin 9: 841–880.
Hart, S. P., Sahlu, T. and Fernandez, J. M. 1993. Efficiency of utilization of high and low quality forage by three goat breeds. Small Ruminant Research 10:293–301.
Hungate, R. E., Phillips, G. D., Hungate, D. P. and Macgregor, A. 1960. A comparison of the rumen fermentation in European and Zebu cattle. Journal of Agricultural Science 54:196–201.
Hunter, R. A. and Siebert, B. D. 1985. Utilization of low-quality roughage by Bos taurus and Bos indicus cattle. 1. Rumen digestion. British Journal of Nutrition 53: 637–648.
Kayouli, C.Jouany, J. P. and Ben Amor, J. 1991. Comparison of microbial activity in the forestomachs of the dromedary and sheep measured in vitro and in sacco on Mediterranean roughages. Animal Feed Science and Technology 33: 237–245.
Kayouli, C.Jouany, J. P., Demeyer, D. I., Ali-Ali, , Taoueb, H. and Dardillat, C. 1993. Comparative studies on the degradation and mean retention time of solid and liquid phases in the forestomachs of dromedaries and sheep fed on low-quality roughages from Tunisia. Animal Feed Science and Technology 40: 343–355.
McDonald, P., Stirling, A. C.Henderson, A. R., Dewar, W. A., Stark, G. H., Davie, W. G., Macpherson, H. T., Reid, A. M. and Slater, J. 1960. Studies on ensilage. Technical bulletin no. 24, Edinburgh School of Agriculture, pp. 1–83.
McDougall, E. I. 1948. Studies on ruminant saliva. I. The composition and output of sheep's saliva. Biochemistry Journal 43: 99–109.
Mann, D. L., Goode, L. and Pond, K. R. 1987. Voluntary intake, gain, digestibility, rate of passage and gastrointestinal fill in tropical and temperate breeds of sheep. Journal of Animal Science 64:880–886.
Ørskov, E. R., Hovell, F. D. DeB. and Mould, F. 1980. The use of the nylon bag technique for the evaluation of feedstuffs. Tropical Animal Production 5: 195–213.
Ottenstein, D. M. and Bartley, D. A. 1971. Separation of free acids C2-C5 in dilute aqueous solution column technology. Journal of Chromatographic Science 9:673–681.
Ranilla, M. J., López, S., Giráldez, F. J., Valdés, C. and Carro, M. D. 1995. Water kinetics in the rumen of two breeds of sheep. Annales de Zootechnie 44: (supplement) 172.
Revesado, P. R., Mantecon, A. R., Frutos, P. and Gonzalez, J. S. 1994. Comparative studies of diet selection by Churra and Merino genotypes grazing on a hill shrub community. In Livestock production and land use in hills and uplands (ed. Lawrence, T. L. J., Parker, D. S. and Rowlinson, P.) occasional publication of the British Society of Animal Production, no. 18, pp. 109–110.
Sahlu, T., Hart, S. P. and Fernandez, J. M. 1993. Nitrogen metabolism and blood metabolites in three goat breeds fed increasing amounts of protein. Small Ruminant Research 10: 281–292.
Sauvant, D. and Milgen, J. van. 1995. Dynamic aspects of carbohydrate and protein breakdown and the associated microbial matter synthesis. In Ruminant physiology: digestion, metabolism, growth and reproduction (ed. Engelhardt, W.v., Leonhard-Marek, S., Breves, G. and Giesecke, D.), pp. 71–94. Ferdinand Enke Verlag, Stuttgart.
Silanikove, N., Tagari, H. and Shkolnik, A. 1993. Comparison of rate of passage, fermentation rate and efficiency of digestion of high fiber diet in desert Bedouin goats compared to Swiss Saanen goats. Small Ruminant Research 12: 45–60.
Smet, A. M. de, Boever, J. L. de, Brabander, D. L. de, Vanacker, J. M. and Boucque, Ch. V. 1995. Investigation of dry matter degradation and acidotic effect of some feedstuffs by means of in sacco and in vitro incubations. Animal Feed Science and Technology 51: 297–315.
Statistical Analysis Systems Institute. 1993. SAS companion for the Microsoft Windows Environment, version 6. SAS Institute Inc., Cary, NC.
Steel, R. G. C. and Torrie, J. H. 1980. Principles and procedures of statistics, second edition. McGraw-Hill, New York.
Stewart, C. S. 1977. Factors affecting cellulolytic activity of rumen contents. Applied Environmental Microbiology 33: 497–502.
Udén, P., Colucci, P. E. and Van Soest, P. J. 1980. Investigation of chromium, cerium and cobalt as markers in digesta. Rates of passage studies. Journal of the Science of Food and Agriculture 31: 625–632.