1. The relative fracture strengths of the inner and outer surfaces of the eggshell of the domestic fowl;Entwistle,1995
2. The snapping strength of the eggshells in various orders of birds;Tyler;J. Zool.,1969
3. The fracture strength under internal pressure of the eggshell of the domestic fowl;Entwistle,1996
4. The Stress Analysis of Pressure Vessels and Pressure Vessel Components;Gill,1970
5. Theory of Shell Structures;Calladine,1983