%0 journal article %@ 0024-9297 %A Nagel, C., Guenther-Schade, K., Fritsch, D., Strunskus, T., Faupel, F. %D 2002 %J Macromolecules %N 6 %P 2071-2077 %T Free volume and transport properties in highly selective polymer membranes %U 6 %X