R. Spörl, R. Youssefi, J. Maier, und G. Scheffknecht. Coal - energy, environment and sustainable development : 33rd Annual International Pittsburgh Coal Conference (IPCC 2016), 1, Seite 444-458. Red Hook, NY, Curran, (2016)
M. Hornberger, R. Spörl, und G. Scheffknecht. 13th International Conference on Greenhouse Gas Control Technologies, GHGT-13, 114, Seite 6171-6174. Amsterdam, Elsevier, (2017)
M. Hornberger, R. Spörl, und G. Scheffknecht. Proceedings of the 12th International Conference of Fluidized Bed Technology, Kraków, Fundacja dla Akademii Górniczo-Hutniczej im. Stanislawa Staszica, (2017)
G. Dunnu, J. Maier, T. Hilber, und G. Scheffknecht. 7th European Conference on Coal Research and its Applications, 88, 12, Seite 2403-2408. Amsterdam, Elsevier, (2009)