1. The EU ban on battery cages: history and prospects;Appleby;State Anim.,2003
2. Shear and Three-point Bending Test of Animal Bone,2005
3. Belanger L. F. 1963. Resorption without osteoclasts (osteolysis). In Symposium on Mechanism of Hard Tissue Destruction. Pages 531–556 in Amer. Assoc. Adv. Sci., R. F. Sognnaes, ed. Washington, DC.
4. Inheritance of bone characteristics affecting osteoporosis in laying hens;Bishop;Br. Poult. Sci.,2000
5. Medullary bone of laying chickens;Bloom;A. J. Anat.,1958