REFERENCES

Alkhalifah, T., and Fomel, S., 1997, Implementing the fast marching eikonal solver: Spherical versus cartesian coordinates: SEP-95, 149-171.

Cao, S., and Greenhalgh, S. A., 1994, Finite-difference solution of the eikonal equation using an efficient, first-arrival wavefront tracking scheme: Geophysics, 59, no. 4, 632-643.

Fomel, S., 1997, A variational formulation of the fast marching eikonal solver: SEP-95, 127-147.

Qin, F., Luo, Y., Olsen, K. B., Cai, W., and Schuster, G. T., 1992, Finite-difference solution of the eikonal equation along expanding wavefronts: Geophysics, 57, no. 3, 478-487.

Sethian, J. A., and Popovici, A. M., 1997, Three-dimensional traveltime computation using the fast marching method: submitted to Geophysics.

Sethian, J. A., 1996, Level set methods: Cambridge University Press, New York.