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2. P. Holtappels, U. Stimming, in: W. Vielstich, A. Lamm, H.A. Gasteiger, Handbook of Fuel Cells, vol. 1, John Wiley & Sons Ltd., Chichester, 2003, p. 348.
3. Proceedings of the Fifth European Solid Oxide Fuel Cell Forum, EFCF;Uehara,2002
4. Auxiliary power unit based on a solid oxide fuel cell and fuelled with diesel