Lybæk, R., T. B. Christensen, and T. Kjær. “Enhancing the Transition Capability of Danish Biomass Technology By Applying a Futures Study Backcasting Methodology on the Biogas Sector.”. European Journal of Sustainable Development, vol. 2, no. 4, Apr. 2013, p. 37, doi:10.14207/ejsd.2013.v2n4p37.