1) Fuel
Volume 65, Issue 2, February 1986, Pages 274-276
"The supercritical fluid extraction of peat using water and aqueous organic solutions"
Warren P. Scarraha and Kenneth L. Myklebust Jr.
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http://dx.doi.org/10.1016/0016-2361(86)90020-7
2) Energy Conversion and Management
Volume 42, Issue 3, February 2001, Pages 279-294
"Supercritical fluid extraction and chemicals from biomass with supercritical fluids"
A. Demirba
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http://dx.doi.org/10.1016/S0196-8904(00)00059-5