@Article{Libson94b,
    author = {P. Anninos and K. Camarda and J. Libson and J. Mass{\'o} and E. Seidel and W.-M. Suen},
    title = {Finding apparent horizons in dynamic 3D numerical spacetimes},
    journal = {Phys. Rev. D},
    year = {1998},
    volume = {58},
    pages = {024003},
    note = {PHY94-07882,PHY94-04788,PHY96-00507,ASC93-18152}
}