References related to software package NET
2-D and 3-D network ray tracing
Klimes, L. & Kvasnicka, M. (1994):
3-D network ray tracing.
Geophys. J. int.
2-D grid travel-time tracing
Klimes, L. (1996):
Grid travel-time tracing: second-order method for the first arrivals in smooth media.
Pure appl. Geophys.