Authors: Qi, CZ Zhang, SH Wu, YJ Zhong, YR Song, DK Wang, TM

Citation: Cz. Qi et al., A study on free volume of acrylonitrile-styrene copolymer and methyl methacrylate-styrene copolymer by using positron annihilation, J POL SC PP, 37(5), 1999, pp. 465-472