%0 conference lecture %@ %A Roeder, J.,Gomes, D.,Ponce, M.L.,Abetz, V.,Pereira Nunes, S. %D 2007 %J Fuel Cells 2007, Advances in Materials for Proton Exchange Membrane Fuel Cell Systems %N %P %T Sulfonated Polyoxazoles Membranes for Fuel Cell Application: Acid Protonation Effect on Conduction Properties %U %X