Glass transition reductions in thin freely-standing polymer films : A scaling analysis of chain confinement effects K. Dalnoki-Veress, J.A. Forrest, P.G. de Gennes et J.R. Dutcher J. Phys. IV France, 10 PR7 (2000) Pr7-221-Pr7-226 DOI: 10.1051/jp4:2000744