@Article{Bona94b,
    author = {C. Bona and J. Mass{\'o} and E. Seidel and J. Stela},
    title = {New Formalism for Numerical Relativity},
    journal = {Phys. Rev. Lett.},
    year = {1995},
    volume = {75},
    number = {4},
    pages = {600-603},
    note = {PHY94-07882,PHY94-04788,ASC93-18152}
}