(:notitlegroup:) 

   @article{liu93,
    title     = {Effect of a Rough Seabed on the Spectral Composition of Deep Ocean Infrasonic
                Ambient Noise},
    author    = {J. Y. Liu and Henrik Schmidt and William A. Kuperman},
    journal   = {Journal Acoustical Society of America},
    pages     = {753--769},
    volume    = {93(2)},
    year      = {1993}}