1. Catechism on Producer Gas;Wyer,1906
2. Generator Gas — The Swedish Experience from 1939–1945;Reed,1980
3. Gasification of wood in a commercial-scale downdraft gasifier;Graham,1981
4. Wood chip gasification in a commercial downdraft gasifier;Walawender,1985
5. Development of a downdraft modular skid mounted biomass/waste gasification system;Graboski,1987