Dielectric relaxations in ultrathin isotactic PMMA films and PS-PMMA-PS trilayer filmsM. Wübbenhorst, C.A. Murray and J.R. DutcherEur. Phys. J. E, 12 (2003) 109-112DOI: https://doi.org/10.1140/epjed/e2003-01-025-1