1. F. Barbir, PEM fuel cells: Theory and practice, Academic press (2012).
2. D. Feroldi and M. Basualdo, Green Energy Technol., 87, 49 (2012).
3. H. Frey and W. Münch, BWK — Energie-Fachmagazin, 56, 58 (2004).
4. G. H. Song and H. Meng, Acta Mech. Sin. Xuebao, 29, 318 (2013).
5. H. A. Gasteiger and M. F. Mathias, Proc. 3rd Symp. Prot. Conduct. Membr. Fuel Cells, 1 (2002).