Ukachukwu, S.N., and U.O. Akpan. “Influence of Level and Duration of Quantitative Feed Restriction on Post-Restriction Egg-Laying Characteristics and Egg Quality of Pullets”. International Journal of Poultry Science, vol. 6, no. 8, July 2007, pp. 567–572, https://doi.org/10.3923/ijps.2007.567.572.