%0 conference lecture %@ %A Richau, K.,Weigel, T.,Klug, P.,Malsch, G.,Swoboda, R.,Ziegler, H.-J.,Otto, S.,Martens, U.,Kneifel, K.,Paul, D. %D 1998 %J NAMS '98 %N %P %T Bipolar Membranes – Preparation and Characterization %U %X