6Dix C X. Seismic velocities from surface measurements[J]. Geophysics, 1955. 20:68- 86.
7Causse E, Haugen G L. Rommel B E. Large offset approximation to seismic reflection traveltimes[J ]. Geophysical Prospecting,2000, 48:753- 778.
8Taner M T,Koehler F. Vclocity spcctra digital computer derivation and application of velocity functions[J]. Geophysics.1969,34 :859 -881.
9Al- Chalabi M. Series approximation in velocity and travel time computations[J]. Geophysical Prospecting,1973, 21: 783 -795.
10Gidlow P M,Fatti J I,. Preserving far offset seismic data u sing non hyperbolic moveout corrections [C]//60^th SEG meeting, San Francisco, USA. Extended Abstracts,1990, 1 726- 1 729.