1. The normal microflora and mucin;Carlstedt-Duke,1989
2. Chesson, A., 1991. Use of bacteria in disease control and growth promotion in pigs and poultry. Pages 1-2 in: Antibacterials and Bacteria. Misset International Book Service, Doetinchem, The Netherlands.
3. Influence of the intestinal microflora on nutrition;Fuller,1983
4. The value of growth promotants in meat birds;Hamilton;Misset-World Poult.,1991
5. The digestive system;Hodges,1974