1. Adams, A. W., 1983. Cage shape, type of cage partition and feed trough divider effects on performance of White Leghorn layers. Pages 7–11 in Proc. 18th Poult. Ind. Conf., Manhattan, KS.
2. Reverse cage demonstrates striking income advantage;Bell;Poult. Dig.,1972
3. A study of cage shape, size and stocking density;Bell;Calif. Coop. Ext. Ser. Progress Poult.,1983
4. An evaluation of small cages for commercial egg production;Bell;Poultry Sci.,1981
5. Bell, D. D., and M. H. Swanson, 1975. Crowding chickens in cages reduces your profits. California Coop. Ext. Ser. L-2273.