Glassy dynamics in nanometer thin layers of polystyreneE.U. Mapesa, M. Erber, M. Tress, K.-J. Eichhorn, A. Serghei, B. Voit and F. KremerEur. Phys. J. Special Topics, 189 (2010) 173-180DOI: https://doi.org/10.1140/epjst/e2010-01320-2