@Article{Lousto97a,
    author = {Carlos O. Lousto and Richard H. Price},
    title = {Headon collisions of black holes: The Particle limit},
    journal = {Phys. Rev.},
    year = {1997},
    volume = {D55},
    pages = {2124-2138},
    eprint = {gr-qc/9609012},
    SLACcitation = {%%CITATION = PHRVA,D55,2124;%%}
}