1. Strategies for upgrading producer gas from fixed bed gasifier systems to internal combustion engine quality;Stassen,1993
2. Method for the sampling and analysis of particles and tars from biomass gasifiers;Hasler,1998
3. Guideline for sampling and analysis of tars and particulates from biomass gasifiers;Hasler,1998
4. Kurkela E, Lappi M, Pitkänen P, Stahlberg P, Leppämäki E VTT draft report for the IEA Agreement, Task VII, Activity 4 (Thermal Gasification), VTT Energy, Gasification Research Group, Espoo, Finland, 1995
5. Testing of a modified sampling train for tars and particulates from biomass gasifiers;Hasler,1998