Abdollahi, M. R., Ravindran, V. & Svihus, B. (2013). Pelleting of broiler diets: An overview with emphasis on pellet quality and nutritional value. Animal Feed Science and Technology, 179, 1-23.
Anderson, K. E., Davis, G. S., Jenkins, P. K. & Carroll, A. S. (2004). Effects of bird age, density and molt on behavioral profiles of two commercial layer strains in cages. Poultry Science, 83, 15-23.
Backhouse, D. & Gous, R. M. (2005). The effect of feeding time on shell quality and oviposition time in broiler breeders. British Poultry Science, 46, 255-259.
Carey, J. B., Kuo, F. L. & Anderson K. E. (1995). Effects of cage population on the productive performance of layers. Poultry Science, 74(2), 633-637.
Davami, A., Wineland, M. J. & Jones, W. T. (1987). Effects of population-size, floor space, and feeder space upon productive performance, external appearance, and plasma-corticosterone concentration of laying hens. Poultry Science, 66, 251-257.
Dozier, W. A., Lott, B. D. & Branton, S. L. (2005). Live performance of male broilers subjected to constant or increasing air velocities at moderate temperatures with a high dew point. Poultry Science, 84, 1328-1331.
Estevez, I. (2007). Density allowances for broiler: where to set the limits? Poultry Science, 86, 1265-1272.
Frikha, M., Safaa, H. M., Serrano, M. P., Arbe, X. & Mateos, G. G. (2009). Influence of the main cereal and feed form of the diet on performance and digestive tract traits of brown-egg laying pullets. Poultry Science, 88, 994-1002.
Gunawardana, P. Sr., Roland, D. A. & Bryant, M. M. (2008). Effect of energy and protein on performance, egg components, egg solids, egg quality, and profits in molted Hy-Line W-36 hens. Journal of Applied Poultry Research, 17, 432-439.
Hamilton, R. M. G. & Proudfood, F. G. (1995). Effects of ingredient particle size and feed form on the performance of leghorn hens. Canadian Journal of Animal Science, 75, 109-114.
Jalal, M. A., Scheideler, S. E. & Marx, D. (2006). Effect of bird cage space and dietary metabolizable energy level on production parameters in laying hens. Poultry Science, 85, 306-311.
Jensen, L. S. (2000). Influence of pelleting on the nutritional needs of poultry. Asian-Australian Journal of Animal Science, 13, 35-46.
Johnston, S. A. & Gous, R. M. (2003). An improved mathematical model of the ovulatory cycle of the laying hen. British Poultry Science, 44, 752-760.
Keeling, L. J., Estevez, I., Newberry, R. C. & Correia, M. G. (2003). Production-related traits of layers reared in different sized flocks: The concept of problematic intermediate group sizes. Poultry Science, 82, 1393-1396.
Leeson, S. & Summers, J. D. (2010). Broiler Breeder Production. Nottingham University Press.
Lewis, P. D., Backhouse, D. & Gous, R. M. (2004). Photoperiod and oviposition time in broiler breeders. Br. Poultry Science, 45, 561-564.
Mtileni, B. J., Nephawe, K. A., Nesamvuni, A. E. & Benyi, K. (2007). The influence of stocking density on body weight, egg weight, and feed intake of adult broiler breeder hens. Poultry Science, 86, 1615-1619.
Nicol, C. J., Brown, S. N., Glen, E., Pope, S. J., Short, F. J., Warriss, P. D., Zimmerman, P. H. & Wilkins, L. J. (2006). Effects of stocking density, flock size and management on the welfare of laying hens in single-tier aviaries. British Poultry Science, 47, 135-146.
Nir, I., Twina, Y., Grossman, E. & Nistan, Z. (1994). Quantitative effects of pelleting on performance, gastrointestinal tract and behaviour of meat-type chickens. British Poultry Science, 35, 589-602.
Novak, C., Yakout, H. & Scheideler, S. (2004). The combined effect of dietary lysine and total sulfur amino acid level on egg production parameters and egg components in Dekalb Delta laying hens. Poultry Science, 83, 977-984.
Olver, M. D. & Malan, D. D. (2000). The effect of choice-feeding from 7 weeks of age on the production characteristics of laying hens. South African Journal of Animal Science, 30, 110-114.
Onbasilar, E. E. & Aksoy, F.T. (2005). Stress parameters and immune response of layers under different cage floor and density conditions. Livestock Production Science, 95, 255-263.
Patterson, P. H. (1997). The relationship of oviposition time and egg characteristics to the daily light: dark cycle. Journal of Applied Poultry Research, 6: 381-390.
Pavlidis, H. O., Price, S. E. & Siege, P. B. (2002). Associations between egg production and clutch length in four selected lines of chickens. Journal of Applied Poultry Research, 11, 304-307.
Puron, D., Santamaria, R., Segaura, J. C. & Alamilla, J. L. (1995). Broiler performance at different stocking densities. Journal of Applied Poultry Research, 4, 55-60.
Rios, R. L., Bertechini, A. G., Carvalho, J. C. C., Castro, S. F. & Costa, V. A. (2009). Effect of cage density on the performance of 25-to 84 week-old laying hens. Brazilian Journal of Poultry Science, 11, 257-262.
Rodenburg, T. B., Tuyttens, F. A. M., Sonck, B., De Koen, R., Lieve, H. & Johan, Z. (2005). Welfare, health, and hygiene of laying hens housed in furnished cages and in alternative housing systems. Journal Applied Animal Welfare Science, 8, 211-226.
Roy, B. G., Kataria, M. C. & Roy, U. (2014). Study of oviposition pattern and clutch traits in a white leghorn (WL) layer population. Journal of Agriculture and Veterinary Science, 7, 2319-2372.
Sahin, S., Macit, M., Esenbuga, N. & Karaca, H. (2007). Effect of cage density on performance and egg quality traits of layers. Journal of Applied Animal Research
, 31, 37-39.
Saki, A. A., Zamani, P., Rahmati, M. & Mahmoudi, H. (2012). The effect of cage density on laying hen performance, egg quality and excreta minerals. Journal of Applied Poultry Research
, 21, 467-475.
SAS Institute. (2009). SAS/STAT® User’s Guide, Release 8.02 ed. Statistical Analysis Systems Institute Inc., Cary, NC, USA
Scott, T. A., Silversides, F. G., Tietge, D. & Swift, M. L. (1999). Effect of feed form, formulation, and restriction on the performance of laying hens. Canadian Journal of Animal Science, 79, 171-178.
Siegel, H. S. (1959). Egg production characteristics and adrenal function in white leghorns confined at different floor space levels. Poultry Science, 38, 893-898.
Sohail, S. S., Bryant, M. M. & Roland, D. A. (2004). Effect of reducing cage density on performance and economics of second-cycle (force rested) commercial Leghorns. Journal of Applied poultry Research
, 13, 401-405.
Sohail, S. S., Bryant, M. M., Rao, S. K. & Roland, D. A. (2001). Influence of cage space and prior dietary phosphorus level on phosphorus requirement of commercial Leghorns. Poultry Science, 80, 769-775.
Tumova, E. & Gous, R. M. (2012). Interrelation between oviposition time, age, and environmental temperature and egg quality traits in laying hens and broiler breeders. Czech Journal of Animal Science, 57, 541-549.
Wahlstrom, A., Tauson, R. & Elwinger, K. (1999). Production and egg quality as influenced by mash or crumbled diets fed to laying hens in an aviary system. Poultry Science, 78, 1675-1680.
Zakaria, A. H. & Omar, O. H. (2013). Egg laying pattern, egg weight, body weight at hatch and sex ratio bias relative to oviposition time of young- and mid-age broiler breeders. Animal Reproduction Science. 141, 80-85.
Zamani, P. (2012). Statistical designs in animal sciences (2nd Ed.). Bu-Ali Sina Univaersity Publications, Hamedan, Iran. (in Farsi)