1. Biewinga, E.E. and van der Bijl, G.: 1996, ‘Sustainability of energy crops in Europe, a methodology developed an applied’, Centre for Agriculture and Environment, CLM 234-1996, Utrecht, February.
2. Braber, K.: 1995, ‘Anaerobic digestion of municipal solid waste: A modern waste disposal option on the verge of breakthrough’, Biomass and Bioenergy 9(1–5), 365–376.
3. Bridgewater, A.V.: 1998, ‘The status of fast pyrolysis of biomass in Europe’, In Proceedings of the 10th European Biomass Conference and Technology Exhibition, Wurzburg, Germany, pp. 268–271.
4. Broek, R., van den, A. Faaij, and van Wijk, A.: 1996, ‘Biomass combustion power generation technologies’, Biomass and Bioenergy 11(4), 271–281.
5. Calis, H.P., Haan, J.P., Peppink, G., Boerigter, H., Van der Drift, B., Venderbosch, R.J., Faaij, A.P.C. and Van den Broek, R.: 2003, ‘Technical and economic feasibility of large scale synthesis gas production in the Netherlands from imported biomass feedstock – a Strategic Decision Analysis study’, Report prepared by: Shell Global Solutions International B.V., Energy Research Center of the Netherlands, Biomass Technology Group B.V., Department of Science, Technology and Society – Utrecht University, Ecofys B.V., sponsored by the Agency for Research in Sustainable Energy (SDE project number P2001-008), p. 50.