%0 conference poster %@ %A Gomes, D., Roeder, J., Pereira Nunes, S. %D 2007 %J VI Congresso Ibero-Americano de Ciencia e Tecnologia de Membranas, CITEM 2007 %T Proton Exchange Membranes for Fuel Cells Based on Sulfonated Polyoxadiazoles %U %X