@Article{Seidel92a,
    author = {E. Seidel and W.-M. Suen},
    title = {Towards a Singularity-Proof Scheme in Numerical Relativity},
    journal = {Phys. Rev. Lett.},
    year = {1992},
    key = {Seidel92a},
    volume = {69},
    number = {13},
    pages = {1845-1848}
}