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Giddey, S.; Badwal, S.P.S.; Kulkarni, A.; Munnings, C. (June 2012). "A comprehensive review of direct carbon fuel cell technology". Progress in Energy and Combustion Science. 38 (3): 360–399. Bibcode:2012PECS...38..360G. doi:10.1016/j.pecs.2012.01.003.
Kamka, Frank; Jochmann, Andreas (June 2005). Development Status of BGL-Gasification(PDF). International Freiberg Conference on IGCC & XtL Technologies. speaker Lutz Picard. Archived from the original(PDF) on 2011-07-19. Retrieved 2011-03-19.
Kamka, Frank; Jochmann, Andreas (June 2005). Development Status of BGL-Gasification(PDF). International Freiberg Conference on IGCC & XtL Technologies. speaker Lutz Picard. Archived from the original(PDF) on 2011-07-19. Retrieved 2011-03-19.