References
- Bogner , H. , Peschke , W. , Seda , V. and Popp , K. 1979 . Studie zum Flaschenbedarf von Legehennen in Kafigen bei Bestimmten Activitaten . Berliner and Muenchener Tieraerztliche Wochenschrift , 92 : 340 – 343 .
- MAFF . 1987 . Codes of Recommendations for the Welfare of Livestock. Domestic Fowls , London : HMSO .
- Freeman , B.M. 1983 . Floor space allowances for the caged domestic fowl . The Veterinary Record , 113 : 23
- Hughes , B.O. 1983 . Space requirements in poultry , Edited by: Baxter , S.H. , Baxter , M.R. and MacCormack , J.A.C. 121 – 128 . The Hague : Martinus Nijhoff .