1Van Toledo B. Role of ultrastructure in determining eggshell strength[J]. Pouhry Science,1981,61:569-572.
2Orberg J. Relationship between the shell membrane-shell bond and the shell deformation in hens' egg [J]. British Poultry Science, 1990,31 : 249-254.
3Barnett D M,Kumpula B L,Petryk R L et al. Hatchability and early chick growth potential of broiler breeder eggs with hairline cracks[J].Journal of Applied Poultry Research,2004,13:65-70.
4Kemps B J,Govaerts T,Ketelaere B De,et al. The influence of line and laying period on the relationship between different eggshell and membrane strength parameters [J]. Poultry Science, 2006,85 : 1309-1317.
