SEARCH Articles Figures Tables Exact Inversions from the Relaxation or Retardation Spectrum Mechanical models, retardation and relaxation time spectra Persistence of Relaxation and Retardation Spectra into the Glassy Zone Relaxation and Retardation Spectra from Experimentally Determined Viscoelastic Functions Relaxation spectrum Retardation and Relaxation Time Spectra Retardation spectrum The Relaxation and Retardation Spectra