Babu, U.; Wiesenfeld, P.; Raybourne, R.; Myers, M.; Gaines, D. Effect of Dietary Fishmeal on Cell-Mediated Immune Response of Laying Hens. Int. J. Poult. Sci. 2005, 4 (9), 652–656. https://doi.org/10.3923/ijps.2005.652.656.