%0 journal article %@ 0323-7648 %A Weigel, T.,Makschin, W.,Albrecht, W.,Klug, P.,Groebe, V.,Paul, D. %D 1991 %J Acta Polymerica %N 8 %P 366-371 %T Bicomponent membranes 4.: influence of membrane formation principles on the structure of the active layer of membranes %U 8 %X