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   @article{jasa85,
    title     = {A Full Wave Solution for Propagation in Multilayered Viscoelastic Media with
                Application to Gaussian Beam Reflection at Fluid-Solid Interfaces},
    author    = {Henrik Schmidt and F. B. Jensen},
    journal   = {Journal Acoustical Society of America},
    pages     = {813--825},
    volume    = {77},
    year      = {1985}}