1. Basel Forum on Biosafety (1994) Biosafety of Foods Derived of Modern Biotechnology. BATS, Basel.
2. Bundesministerium fur Ernährung, Landwirtschaft und Forsten (1989) Folgen des Einsatzes von BST in der deutschen Milcherzeugung. Landwirtschaftsverlag, Münster-Hiltrup.
3. Devlin, R.H., Yesaki, T.Y., Biagi, C.A., Donalson, E.M., Swanson, P. and Chan, W.-K. (1994) Extraordinary salmon growth. Nature 371: 209 - 210.
4. Drasar, B.S. and Barrow, P.A. (1985) Intestinal Microbiology. American Society for Microbiology, Washington.
5. Gasson, M.J. and de Vos, W.M. (1994) Genetics and Biotechnology of Lactic Acid Bacteria. Blackie Academic and Professional, London.