1. Alakangas E Paju P 2002 Wood Pellets in Finland - Technology, Economy and Market. OPET Report 5 VTT Processes Jyväskylä
2. Bergman PCA 2005 Combined Torrefaction and Pelletisation: The Top Process Energy Research Centre of the Netherlands Petten, the Netherlands. PDF document http://www.ecn.nl/publications/ECN-C--05-013
3. Torrefaction of reed canary grass, wheat straw and willow to enhance solid fuel qualities and combustion properties;Bridgeman;Fuel,2008
4. Assessment of the potential biomass supply in Europe using a resource-focused approach;Ericsson;Biomass and Bioenergy,2006
5. Kiel JHA Verhoeff F Gerhauser H Meuleman B 2008 BO2-Technology for Biomass Upgrading into Solid Fuel - Pilot-Scale Testing and Market Implementation Energy Research Centre of the Netherlands Petten, the Netherlands http://www.ecn.nl/publications/ECN-M--08-036