1. M. von Stackleberg, Die Kristallstruktur von Karbiden (The Crystal Structure of Carbides), Naturwissenshaften, 1930, 18, p 1098-1107, in German
2. J. Larminie and A. Dicks, Fuel Cell Systems Explained, Wiley, Chichester, 2003, p 173-180, in English
3. L. Pauling, The Nature of the Chemical Bond, 3rd ed., Cornell University Press, Ithaca, 1960, p 98-100, in English
4. G. Hoogers, Fuel Cell Technology Handbook, CRC Press, Cleveland, 2003, p 2-9, in English
5. T.M. Gur and R.A. Huggins, Direct Electrochemical Conversion of Carbon to Electrical Energy in a High Temperature Fuel Cell, J. Electrochem. Soc., 1992, 139(1992), p 95-97, in English