1. Biomass for renewable energy, fuels and chemicals;Klass,1998
2. New Methods for chemical and physical characterization and round robin testing;Meir,1999
3. Oasmaa A, Meier D. Subject group: analysis and characterization. PyNe workshop Birmingham, UK, 2–4 December 2000.
4. Fagernas L. Chemical and physical characterization of biomass-based pyrolysis oils. Literature Review, VTT-Research notes 1706, Espoo, Finland, 1995.
5. Physical characterization of biomass-based pyrolysis liquids. Applications of standard fuel oil analyses;Oasmaa,1997