- Gregory , N.G. and Wilkins , L.J. 1989 . Broken bones in domestic fowl: handling and processing damage in end of lay battery hen . British Poultry Science , 30 : 555 – 562 .
- Randall , C.J. and Duff , S.R.I. 1988 . Avulsion of the patellar ligament in osteopenic laying fowl . Veterinary Record , 123 : 439 – 441 .
- Wilson , S. and Duff , S.R.I. 1990 . Morphology of medullary bone during the egg formation cycle . Research in Veterinary Science , 48 : 216 – 220 .
British Poultry Science
Volume 31, 1990 - Issue 4