[Abrahamsson P., Tauson R. (1995). Aviary systems and conventional cages for laying hens: effects on production, egg quality, health and bird location in three hybrids. Acta Agr. Scand., 45, 3: 191-203.]Search in Google Scholar
[Anton M., Nau F., Nys Y. (2006). Bioactive egg components and their potential uses. World's Poultry Sci. J., 62: 429-438.]Search in Google Scholar
[Biesiada-Drzazga B., Janocha A. (2009). Impact of hen breed and rearing system on the quality of eggs for consumption (in Polish). Food. Science. Technology. Quality, 3, 64: 67-74.]Search in Google Scholar
[Calik J., Połtowicz K., Wężyk S. (2003). Effect of housing system of laying hens and storage conditions of table eggs on their quality (in Polish). Wyniki Oceny Użytkowości Drobiu, 31: 57-62.]Search in Google Scholar
[Dukić-Stojčić M., Perić L., Bjedov S., Milošević N. (2009). The quality of table eggs produced in different housing systems. Biot. Anim. Husbandry, 25 (5-6): 1103-1108.]Search in Google Scholar
[Górski J., Witak B., Biesiada-Drzazga B. (2002). Analysis of production and economic results obtained in two laying periods of hens kept on litter or in batteries (in Polish). Rocz. Nauk. Zoot., Supl., 16: 103-108.]Search in Google Scholar
[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, 3: 1031-1038.]Search in Google Scholar
[Krawczyk J., Calik J. (2006). Egg quality in free-range hens. Pol. J. Nat. Sci., Supl., 3 (1): 433-438.]Search in Google Scholar
[Krawczyk J., Gornowicz E. (2010). Quality of eggs from hens kept in two different free-range systems in comparison with a barn system. Arch. Geflügelk., 74 (3): 151-157.]Search in Google Scholar
[Lewko L., Gornowicz E. (2009). Egg albumen quality as affected by bird origin. J. Cent. Eur. Agric., 10, 4: 455-464.]Search in Google Scholar
[Nowak A., Sobczak J. (2005). Housing system of laying hens and consumers quality (in Polish). Proc. XVII Int. Poultry Symp., Kiekrz near Poznań, pp. 91-92.]Search in Google Scholar
[Pišteková V., Hovorka M., Većerek V., Straková E., Suchý P. (2006). The quality comparison of eggs laid by laying hens kept in battery cages and in a deep litter system. Czech. J. Anim. Sci., 51: 318-325.]Search in Google Scholar
[Sobczak J. (2008). The investigations of economic efficiency of consumers' eggs production under recommended keeping system for hens (in Polish). Probl. Inż. Roln., 3: 95-103.]Search in Google Scholar
[Sokołowicz Z., Krawczyk J. (2009). Housing system of laying hens as a factor for sustainable dewelopment (in Polish). Zesz. Nauk. PTIE i PTG Oddz. w Rzeszowie, 11: 249-252.]Search in Google Scholar
[Sparks N.H.C. (2006). The hen's egg - is its role in human nutrition changing? World Poultry Sci. Assoc., 62: 308-315.]Search in Google Scholar
[Tauson R. (2005). Management and housing systems for layers - effects on welfare and production. World Poultry Sci., 61: 477-490.]Search in Google Scholar
[Vanden Brand H., Parmentier H.K., Kemp B. (2004). Effects of housing system (outdoor vs cages) and age of laying hens on egg characteristics. Brit. Poultry Sci., 45: 745-752.]Search in Google Scholar
[Voslářová E., Hanzálek Z., Večerek V., Straková E., Suchý P. (2006). Comparison between laying hen performance in the cage system and the deep litter system on a diet free from animal protein. Acta Vet. Brno, 75: 219-225.]Search in Google Scholar