@article{frederickson:1994:tst,
    author = {Frederickson, C. K. and Marston, P. L.},
     title = {Travel time surface of a transverse cusp caustic produced
              by reflection of acoustical transients from a curved
              metal surface},
   journal = {J. Acoust. Soc. Amer.},
    volume = {95},
      year = {1994},
    number = {2},
     pages = {650–660},
       doi = {10.1121/1.408425}}