R. Spörl, R. Youssefi, J. Maier, and G. Scheffknecht. Coal - energy, environment and sustainable development : 33rd Annual International Pittsburgh Coal Conference (IPCC 2016), 1, page 444-458. Red Hook, NY, Curran, (2016)
F. Rückert, J. Ströhle, T. Sabel, U. Schnell, and K. Hein. Sixth International Conference on Technologies and Combustion for a Clean Environment, 1, page 99-105. Lisbon, Direcção-Geral da Energia, (2001)
M. Bari, G. Baumbach, G. Scheffknecht, and B. Kuch. Proceedings of the 2nd International conference on Environmental management, engineering, planning and economics (CEMEPE 2009) and SECOTOX Conference, Thessaloniki, CEMEPE, (2009)
G. Scheffknecht, J. Maier, R. Berger, and H. Thorwarth. Current Issues of Constructions and Operation of Boilers : 10th International Conference on Boiler Technology, Gliwice, (2006)