1. Anonymous. 1971. 8 Publicatieblad van de Europese Gemeenschappen, 14 (L. 279)
2. Anonymous. 1972. 9 Publicatieblad van de Europese Gemeenschappen, 15 (L. 123)
3. Armstrong, D. G. 1986.Control and Manipulation of Animal Growth, Edited by: Buttery, P. J., Lindsay, D. B. and Haynes, N. B. 21London: Butterworths.
4. Small intestinal bacterial overgrowth syndrome