V. Christensen, L. Bagley, T. Olson, J. Grimes, R. Rowland, and D. Ort, “Shell Thickness of Turkey Eggs Affects Cardiac Physiology and Embryo Survival”, Int. J. Poult. Sci., vol. 5, no. 8, pp. 796–803, Jul. 2006, doi: 10.3923/ijps.2006.796.803.