Some relevant parameters affecting the glass transition of supported ultra-thin polymer films Y. Grohens, L. Hamon, G. Reiter, A. Soldera and Y. Holl Eur. Phys. J. E, 8 2 (2002) 217-224 Published online: 15 May 2002 DOI: 10.1140/epje/i2001-10088-4