%0 journal article %@ 0024-9297 %A Hofmann, D., Heuchel, M., Yampolskii, Y., Khotimskii, V.S., Shantarovich, V.P. %D 2002 %J Macromolecules %P 2129-2140 %T Free Volume Distributions in Ultrahigh and Lower Free Volume Polymers: Comparison between Molecular Modeling and Positron Lifetime Studies %U %X