1. Energy Information Administration. Independent statistics and analysis. Department of energy; United States: (2009) http://www.eia.doe.gov/oiaf/ieo/world.html (26.08.10).
2. Kåberger T, Lublin Z, Andersson A. Report on the annual Energy in Sweden. Swedish Energy Agency, 2009. http://www.energimyndigheten.se/en/(22.07.11).
3. CHP in the pulp industry using black liquor gasification: thermodynamic analysis;Berglin;Appl Therm Eng,1998
4. Ekbom T, Lindblom M, Berglin N, Ahlvik P. Technical and commercial feasibility study of black liquor gasification with Methanol/DME production as motor fuels for automotive uses-BLGMF. Report for contract no. 4.1030/Z/01-087/2001, European commission Altener program, Sweden 2003.
5. Efficient energy systems with CO2 capture and storage from renewable biomass in pulp and paper mills;Möllersten;Renew Energy,2004