T. B. B. H. G. C. A. :G. B.  Cook and et al., ?Boosted three-dimensional black-hole evolutions with singularity excision?, Phys. Rev. Lett. 80. pp. 2512-2516, 1998.

T. B. B. H. G. C. A. :A. M.  Abrahams and et al., ?Gravitational wave extraction and outer boundary conditions by perturbative matching?, Phys. Rev. Lett. 80. pp. 1812-1815, 1998.

T. B. B. H. G. C. A. :R.  Gomez and et al., ?Stable characteristic evolution of generic 3-dimensional single-black-hole spacetimes?, Phys. Rev. Lett. 80. pp. 3915-3918, 1998.