@article{378086,
      author = {Barrabes, Claude. and Hogan, P. A.},
      url = {http://library.usi.edu/record/378086},
      title = {Singular null hypersurfaces in general relativity  light-like signals from violent astrophysical events /  [electronic resource] :},
      publisher = {World Scientific,},
      recid = {378086},
      pages = {x, 193 p. :},
      address = {River Edge, N.J. :},
      year = {2003},
}