1. Catalytic conversion of tars, carbon black and methane from pyrolysis/gasification of biomass;Ekström,1985
2. Conversion of tar in pyrolysis gas from wood using a fixed dolomite bed;Aldén,1988
3. Catalytic purification of tarry fuel gas;Simell;Fuel,1990
4. Catalytic purification of tarry fuel gas with carbonate rocks and ferrous materials;Simell;Fuel,1992
5. Simell P, Kurkela E, Ståhlberg P. Formation and catalytic decomposition of tars from fluidized-bed gasification. In: Bridgwater AV, editor. Advances in thermochemical biomass conversion, vol. 1. Glasgow: Blackie Academic and Professional, 1994. p. 265–79.