El Bagir, N. M., Hama, A. Y., Hamed, R. M., El Rahim, A. G. A., & Beynen, A. C. (2006). Lipid Composition of Egg Yolk and Serum in Laying Hens Fed Diets Containing Black Cumin (Nigella sativa). International Journal of Poultry Science, 5(6), 574–578. https://doi.org/10.3923/ijps.2006.574.578