Ahmad, S.; Ahsan-ul-Haq; Yousaf, M.; Nawaz, H. Effect of Feeding Canola Oil and Vitamin A on the Fatty Acid Profile of Egg Yolks in Laying Hens. Pak. J. Nutr. 2010, 9 (2), 191–194. https://doi.org/10.3923/pjn.2010.191.194.