NASSEF, E.E., BAKR, A.A. and SALAMA, A.S. 2019. Feeding a definite concentration of eicosapentaenoic and docosahexaenoic fatty acids to laying hens. Journal of the Hellenic Veterinary Medical Society. 70, 1 (Apr. 2019), 1393–1400. DOI:https://doi.org/10.12681/jhvms.20345.