Abrahamsson P, Tauson R. 1995. Aviary systems and conventional cages for laying hens: Effects on production, egg quality, health and birds’ location in three hybrids. Acta Agric Scand A Anim Sci 45:191–203.
Abrahamsson P, Tauson R, Elwinger K. 1996. Effect on production, health and egg quality of varying proportions of wheat and barley in diets for two hybrids of laying hens kept in different housing systems. Acta Agric Scand 46:173–182.
Casiraghi E, Hidalgo A, Rossi M. 2005. Influence of weight grade on shell characteristics of marketed hen eggs. In : Proceedings of the 10th European symposium on the quality of eggs and egg products; p. 183–188. Doorwerth: WPSA.
Coucke P, Dewil E, Decuypere E, De Baerdemaeker J. 1999. Measuring the mechanical stiffness of an eggshell using resonant frequency analysis. Br Poult Sci 40:227–232.
Dukic-Stojcic M, Peric L, Bjedov S, Milosevic N. 2009. The quality of table eggs produced in different housing systems. Biotech Anim Husbandry 25:1103–1108.
Duncan IJH. 1992. Guest editorial: Designing environments for animals─Not for public perceptions. Br Vet J 148:475–477.
Guesdon V, Ahmed AMH, Mallet S, Faure JM, Nys Y. 2006. Effects of beak trimming and cage design on laying hen performance and egg quality. Br Poult Sci 47:1–12.
Hidalgo A, Rossi M, Clerici F, Ratti S. 2008. A market study on the quality characteristics of eggs from different housing systems. Food Chem 106:1031–1038.
Lesson S, Summers JD. 1991. Commercial poultry nutrition. University Books Guelph Ontario Canada
Mallet S, Guesdon V, Ahmed AMH, Nys Y. 2006. Comparison of eggshell hygiene in two housing systems: Standard and furnished cages. Br Poult Sci 47:30–35.
Pavlovski Z, Cunja D, Mašić B. 1989. Kvalitet jaja kokoši držanih u različitim sistemima proizvodnje. Peradarstvo 11–12. 344–345.
Pavlovski Z, Hopic S, Lukic M. 2001. Housing system for layers and egg quality. Biotech Anim Husb 17:197–201.
Pistekova V, Hovorka M, Vecerek V, Strakova E, Suchy P. 2006. The quality comparison of egg laid by laying hens kept in battery cages and in a deep litter system. Czech J Anim Sci 51:318–325.
Preisinger R. 2000. Lohmann tradition, praxiserfahrung und entwicklungsperspektiven. Lohmann Inform 3:13–16.
Reed HJ. 1994. Designing a nest for a battery cage. p. 27–34. Modified Cages for Laying Hens. Sherwin CM, editorUniversities Federation for Animal Welfare; Potters Bar, UK:
De Reu K, Grijspeerdt K, Heyndrickx M, Zoons J, De Baere K, Uyttendaele M, Debevere J, Herman L. 2005. Bacterial eggshell contamination in conventional cages, furnished cages and aviary housing systems for laying hens. Br Poult Sci 46:149–155.
Roberts JR. 2004. Factors affecting egg internal quality and egg shell quality in laying hens. J Poult Sci 41:161–177.
SAS Institute. 2004. SAS/STAT user’s guide. Version 9.1. SAS Institute Inc; Cary, NC:
Schlatterer J, Breithaupt D. 2006. Xanthophylls in commercial egg yolks: Quantification and identification by HPLC and LC-(APCI) MS using a C30 phase. J Agric Food Chem 54:2267–2273.
Singh R, Cheng KM, Silversides FG. 2009. Production performance and egg quality of four strains of laying hens kept in conventional cages and floor pens. Poult Sci 88:256–264.
Stadelman WJ. 1995. Quality identification of shell eggs. Egg science and technology. Stadelman WJ, Cotterill OJ, editorsp. 39–66. New York: Food Products Press, The Haworth Press, Inc.
Suto Z, Horn P, Ujvari J. 1997. The effect of different housing systems on production and egg quality traits of brown and Leghorn type layers. Acta Agraria Kaposvariensis 1:29–35.
Tactacan GB, Guenter W, Lewis NJ, Rodriguez-Lecompte JC, House JD. 2009. Performance and welfare of laying hens in conventional and enriched cages. Poult Sci 88:698–707.
Tauson R, Wahlstrom A, Abrahamsson P. 1999. Effect of two floor housing systems and cages on health, production, and fear response in layers. J Appl Poult Res 8:152–159.
Taylor AA, Hurnik JF. 1996. The long-term productivity of hens housed in battery cages and aviary. Poult Sci 75:47–51.
Tumova E, Ebeid T. 2003. Effect of housing system on performance and egg quality characteristics in laying hens. Scientia Agriculturae Bohemica 34:73–80.
Van Den Brand H, Parmentier HK, Kemp B. 2004. Effects of housing system (outdoor vs cages) and age of laying hens on egg characteristics. Br Poult Sci 45:745–752.
Vits A, Weizenburger D, Hamann H, Distl O. 2005. Influence of different small group systems on production traits, egg quality and bone breaking strength of laying hens. First communication: Production traits and egg quality. Zuchtungskunde 77:303–323.
Wall H. 2011. Production performance and proportion of nest eggs in layer hybrids housed in different designs of furnished cages. Poult Sci 90:2153–2161.
Weitzenbürger D, Vits A, Hamann H, Distl O. 2005. Effect of furnished small group housing systems and furnished cages on mortality and causes of death in two layer strains. Br Poult Sci 46:553–559.
Yakabu A, Salako AE, Ige AO. 2007. Effect of genotype and housing system on the laying performance of chickens in different seasons in semi-humid tropics. Int J Poult Sci 6:434–439.