Blázquez Abellán, G., M. T. Orzáez Villanueva, and A. Díaz Marquina. “ Extra and Popular Qualities”. Grasas y Aceites 48, no. 3 (June 30, 1997): 159–165. Accessed December 9, 2023. https://grasasyaceites.revistas.csic.es/index.php/grasasyaceites/article/view/784.