S. Ukachukwu and U. Akpan, “Influence of Level and Duration of Quantitative Feed Restriction on Post-Restriction Egg-Laying Characteristics and Egg Quality of Pullets”, Int. J. Poult. Sci., vol. 6, no. 8, pp. 567–572, Jul. 2007, doi: 10.3923/ijps.2007.567.572.