E. Peebles, S. Park, S. Branton, P. Gerard, and S. Womack, “Influence of Supplemental Dietary Poultry Fat, Phytase and 25-hydroxycholecalciferol on the Blood Characteristics of Commercial Layers Inoculated Before or at the Onset of Lay with F-strain Mycoplasma gallisepticum”, Int. J. Poult. Sci., vol. 9, no. 11, pp. 1002–1005, Oct. 2010, doi: 10.3923/ijps.2010.1002.1005.