1. Involvement of melatonin and thyroid hormones in the control of sleep, food intake and energy metabolism in the domestic fowl;Bermudez;J. Physiol. (Lond.),1983
2. Canadian Council on Animal Care, 1984. Guide to the Care and Use of Experimental Animals. Volumes 1 and 2 (1980–1984). 1105–151 Slater Street, Ottawa, ON, Canada.
3. Photoperiodic effects on performance and leg abnormalities in broiler chickens;Classen;Poultry Sci.,1989
4. Classen, H. L., and C. Riddell, 1990. Early growth rate and lighting effects on broiler skeletal disease. Poultry Sci. 69:(Suppl. 1):35.(Abstr.)
5. Effects of increasing photoperiod length on performance and health of broiler chickens;Classen;Br. Poult. Sci.,1991