Rafalowski, Ryszard, Zofia Zegarska, Andrzej Kuncewicz, and Zbigniew Borejszo. 2008. “Fatty Acid Composition, Tocopherols and Beta-Carotene Content in Polish Commercial Vegetable Oils”. Pakistan Journal of Nutrition 7 (2): 278–282. https://doi.org/10.3923/pjn.2008.278.282.