Ghanem , H.M., et al. “Evaluation of Egg Quality Indices, Fertility, Hatchability % and Some Biochemical Parameters under the Effect of Some Environmental Stressors in Laying Hen”. International Journal of Poultry Science, vol. 16, no. 8, July 2017, pp. 310–316, https://doi.org/10.3923/ijps.2017.310.316.