Serrada Hierro, R., J. A. Bravo Fernández, and S. Roig Gómez. “Aged Holm-Oak (Quercus Ilex Subsp. Ballota) Sprounting. Experiences in Riofrío Forest (Segovia)”. Forest Systems, Vol. 13, no. S1, Oct. 2004, pp. S127-S141, doi:10.5424/srf/200413S1-00861.