Jorge, N., L. A. Guaraldo Gonçalves, and M. C. Dobarganes. “Influence of Fatty Acid Composition on the Formation of Polar Glycerides and Polar Fatty Acids in Sunflower Oils Heated at Frying Temperatures”. Grasas Y Aceites, vol. 48, no. 1, Feb. 1997, pp. 17-24, doi:10.3989/gya.1997.v48.i1.763.