1. H.J.R. Maget, in: C. Berger (Ed.), Handbook of Fuel Cell Technology, Prentice-Hall, Englewood Cliffs, NJ, USA, 1968, p. 425.
2. J. O’M. Bockris, S. Srinivasan, Fuel Cells: Their Electrochemistry, McGraw-Hill, New York, 1969.
3. Analysis of proton exchange membrane fuel cell performance with alternate membranes
4. B. Bahar, A.R. Hobson, J.A. Kolde, US Patent No. 5,599,614 (1997).