V. Christensen, M. Wineland, D. Ort, K. Mann, and E. Neely, “Eggshell Conductance and Incubator Humidity as Factors in Embryo Survival and Poult Growth”, Int. J. Poult. Sci., vol. 5, no. 9, pp. 830–837, Aug. 2006, doi: 10.3923/ijps.2006.830.837.