Ballesteros, I., J. M. Oliva, M. J. Negro, P. Manzanares, and M. Ballesteros. “Simultaneous Saccharification and Fermentation Process for Converting the Cellulosic Fraction of Olive Oil Extraction Residue into Ethanol”. Grasas Y Aceites, vol. 53, no. 3, Sept. 2002, pp. 282-8, doi:10.3989/gya.2002.v53.i3.318.