Investigation of structural relaxation and surface modification of ultrathin films of poly(ethylene terephthalate)D. Prevosto, S. Napolitano, P. Pingue, S. Capaccioli and M. LucchesiEur. Phys. J. Special Topics, 141 (2007) 193-198DOI: https://doi.org/10.1140/epjst/e2007-00039-5