Free Volumes in Polystyrene Probed by Positron Annihilation A. Uedono, T. Kawano, L. Wei, S. Tanigawa, M. Ban et M. KyotoJ. Phys. IV France, 05 C1 (1995) C1-199-C1-203DOI: https://doi.org/10.1051/jp4:1995123
