Pérez-Camino, M. C., Ruiz-Méndez, M. V., Márquez-Ruiz, G. and Dobarganes, M. C. (1993) “Virgin and refined olive oils: Differences in glyceridic minor compounds”, Grasas y Aceites, 44(2), pp. 91–96. doi: 10.3989/gya.1993.v44.i2.1103.