Wagner K., Häggström G., Mauerhofer A.M., Kuba M., Skoglund N., Öhman M., Hofbauer H. Layer formation on K-feldspar in fluidized bed combustion and gasification of bark and chicken manure. 2019. Biomass and Bioenergy. 127. 105251. 10.1016/j.biombioe.2019.05.020.