AOAC. 1990. Official Methods of Analysis. 15th Edition. Association of Official Analytical Chemists, Washington, DC.
Castro, M. and M. Iglesias. 1989. Effect of zeolite on traditional diets for fattening pigs. Cuban J. Agric. Sci. 23:289-291.
Castro, M. and E. Mas. 1989. Effect of different levels of zeolite on the balance of some nutrients for pre-fattening pig feeds. Cuban J. Agric. Sci. 23:55-59.
Collings, G. F., S. A. Thomasson, P. K. Ku and E. R. Miller. 1980. Sodium bentonite in swine diets. J. Anim. Sci. 50:272-277.
Fenton, T. W. and M. Fenton. 1979. An improved procedure for the determination of chromic oxide in feed and faces. Can. J. Anim. Sci. 59:631-634.
Han, I. K., J. H. Lee, X. S. Piao and D. F. Li. 2001. Feeding and management system to reduce environmental pollution in swine production: A review. Asian-Aust. J. Anim. Sci. 14:432-444.
Kornegay, E. T. and M. W. A. Verstegen. 2001. Swine nutrition and environmental pollution and odor control. In: Swine Nutrition (Ed. A. J. Lewis and L. L. Southern). CRC Press, Baco Raton, FL. pp. 609-630.
Kwon, O. S., I. H. Kim, J. W. Hong, S. H. Lee and Y. K. Jung. 2002a. Evaluation of germanium biotite as a substitute for antibiotics in growing pig diets. J. Anim. Sci. 80 (Suppl. 1) 391 (Abstr).
Kwon, O. S., I. H. Kim, J. W. Hong, S. H. Lee and Y. K. Jung. 2002b. Effects of germanium biotite supplementation on the growth performance and serum characteristics in nursery pigs. J. Anim. Sci. 80 (Suppl. 1) 394 (Abstr).
Matthews, J. O., J. J. Southern and T. D. Bidner. 1999. Effect of a hydrated sodium calcium alumninosilicate on growth performance and carcass traits of pigs. Prof. Anim. Sci. 15:196-200.
Mumpton, F. and P. H. Fishman. 1977. The application of natural zeolites in animal science and aquaculture. J. Anim. Sci. 45:1188-1203.
National Research Council, National Academy of Sciences, 1998. Nutrient Requirements of Domestic Animals. No. 2. Nutrient Requirements of Swine. 10th Edition. NAS-NRC, Washington, DC.
Paik, I. K. 2001. Management of excretion of phosphorus, nitrogen and pharmacological level minerals to reduce environmental pollution from animal production: A review. Asian-Aust. J. Anim. Sci. 14:384-394.
Pearson, G., W. C. Smith and J. M. Fox. 1985. Influence of dietary zeolite on pig performance over the weight range 25-87 kg. New Zealand J. Exp. Agric. 13:151-154.
Pond, W. G., J. T. Yen, R. N. Lindvall and R. R. Maurer. 1981. Effect of pig breed group and of soil or clinoptilolite (a zeolite) in the pen environment on preweaning weight gain and survival. Nutr. Rept. Intern. 24:443-449.
Pond, W. G., J. T. Yen and V. H. Varel. 1988. Response of growing swine to dietary copper and clinoptilolite supplementation. Nutr. Rept. Intern. 37:795-803.
Saskatchewan Pork International. 2000. Mitchell’s Gourmet Foods Inc. Hog Settlement Grid.
Shurson, G. C., P. K. Ku, E. R. Miller and M. T. Yokoyama. 1984. Effects of zeolite or clinoptilolite in diets of growing swine. J. Anim. Sci. 59:1536-1545.
Statistical Analysis System Institute, Inc. 1990. SAS Users Guide, Version S. SAS Institute Inc., Cary, NC.
Taverner, M. R., R. G. Campbell and R. S. Biden. 1984. A note on sodium bentonite as an additive to grower pigs diets. Anim. Prod. 38:137-139.
Varell, V. H., I. S. Robinson and W. G. Pond. 1987. Effect of dietary copper sulphate, Aureo SP250, or clinoptilolite on ureolytic bacteria found in the pig large intestine. Appl. Environ. Microbiol. 53:2009-2013.
Ward, T. L., K. L. Watkins, L. L. Southern, P. G. Hoyt and D. D. French. 1991. Interactive effects of sodium zeolite-A and copper in growing swine: Growth, and bone and tissue mineral concentrations. J. Anim. Sci. 69:726-733.