Ma C., Carlborg M., Hedman H., Wennebro J., Weiland F., Wiinikka H., Backman R., Öhman M. Ash Formation in Pilot-Scale Pressurized Entrained-Flow Gasification of Bark and a Bark/Peat Mixture. 2016. Energy and Fuels. 30. 12. 10543-10554. 10.1021/acs.energyfuels.6b02222.