)٣( Hall, D. O., Rosillo-Calle, F., Scrase &quot; Biomass: an environmentally acceptable and sustainable energy source for the future &quot; . ــ ــ ــ ــ ــ
3 D. O. Hall, F. Rosillo-Calle, J. I. Scrase &quot; Biomass: an environmentally acceptable and sustainable energy source for the future &quot; ( &quot; La biomasa: una fuente de energía ecológicamente aceptable y sostenible para el futuro &quot; ).