Marmesat, S., J. Velasco, G. Márquez-Ruiz, and M.C. Dobarganes. “A Rapid Method for Determination of Polar Compounds in Used Frying Fats and Oils”. Grasas y Aceites 58, no. 2 (June 30, 2007): 179–184. Accessed April 20, 2024. https://grasasyaceites.revistas.csic.es/index.php/grasasyaceites/article/view/83.