1. Acikgoz, Z., Ayhan, V., Ozkan, K., Altan, O., Altan, A., Ozkan, S. and Akbas, Y., 2003. The effects of dietary oil and methionine on performance and egg quality of commercial laying hens during summer season, Archiv Für Geflügelkunde, 67, 204–207.
2. Alvarez, C., Cachaldora, P., Mendez, J., Garcia-Rebollar, P. and De-Blas, J, C., 2005. Effect of dietary conjugated linoleic acid and fish oil supplementation on performance and egg quality in laying hens, British Poultry Science, 45, 524–529.
3. An, B. K., Nishiyama, H., Tanaka, K., Ohtani, S., Iwata, S., Tsutsumi, K. and Kasa, M., 1997. Dietary safflower phospholipid reduces liver lipids in laying hens, Poultry Science, 76, 689–695.
4. AOAC., 1990. Official Methods of Analysis 15th ed. (Association of Official Analytical Chemists, Washington, DC).
5. Atteh, J. O. and Leeson, S., 1985. Response of laying hens to dietary saturated and unsaturated fatty acids in the presence of varying dietary calcium levels, Poultry Science, 64, 520–528.