1. Ray Methods for Waves in Elastic Solids: with Applications to Scattering by Cracks;Achenbach,1982
2. Seismic rays as Finsler geodesics;Antonelli;Nonlinear Analysis,2002
3. Ray method of calculating the intensity of wavefronts in the case of a heterogeneous, anisotropic, elastic medium;Babich,1961
4. Mathematical Methods for Wave Phenomena;Bleistein,1984
5. Seismic Ray Theory;Červený,2001