@Article{Baker00a,
    author = {J. Baker and M. Campanelli},
    title = {Making use of geometrical invariants in black hole collisions},
    journal = {Phys. Rev. D},
    year = {2000},
    volume = {62},
    pages = {127501}, e-print = {gr-qc/0003031},
    note = {AEI-2000-016}
}