1. D.C. Elliott, Analysis and upgrading of biomass liquefaction products, Final Report, vol. 4, Pacific Northwest Laboratory, Washington, USA, 1983, p. 87+app.
2. Research in Thermochemical Biomass Conversion, Appl. Sci., Phoenix;Chum,1988
3. J.W. McKinley, Biomass Liquefaction: Centralized Analysis, Final report, B.C. Research, Vancouver, Canada, 1989.
4. T.A. Milne, A.H. Brennan, B.H. Glenn, Sourcebook of Methods of Analysis for Biomass and Biomass Conversion Processes, Appl. Sci., New York, USA, 1990. p. 327+app.
5. Storage of biomass pyrolysis oils;Czernik,1994