4. B. Heed, B. Zhu, B.-E. Mellander, A. Lunden, Solid State Ionics 46 (1991)121
5. P. Tomczyk, Karbo, 3 (2004) 135-141
6. T. Iwasita, Handbook of Fuel Cells, Wiley, 2003 t.2 604
7. S. Surampudi i inni, J. Power Sources, 47 (1994) 377
8. F.A. Brammer "Das Brennstoffzellensystem ONSI PC25A/C" w Offentliche Energieversorgung und Hausenenergiesysteme mit Brennstoffzellen H. Wendt, F. Brammer, W. Weise (Red.) Expert Verlag, Renningen, 1999, 23-44
9. Anareobic Gas Fuel Cell Shows Promise, Modern Power Systems, 1997
10. U. Langnickel, Fuel Cells Bulletin, 22 (2000) 10-12
11. S.T. Naumann, C. Myren, J. Power Sources 56 (1995) 45-49
12. C. Bentley, M. Farooque, J. Leitman "Direct fuel cell commercialization" w Fuel Cell Seminar - Powering the 21st Century, Portland 2000 456-459
13. T. Ishikawa, H. Yasue, J. Power Palnt 86 (2000) 145-150