@article{kerr:1963:gfo,
    author = {Kerr, Roy P.},
     title = {Gravitational field of a spinning mass as an example of
              algebraically special metrics},
   journal = {Phys. Rev. Lett.},
    volume = {11},
    number = {5},
      year = {1963},
     pages = {237–238},
   mrclass = {83.53},
  mrnumber = {MR0156674 (27 \#6594)},
mrreviewer = {C. Gilbert},
       doi = {10.1103/PhysRevLett.11.237},
     zblno = {0112.21904}}