RT Journal Article SR Electronic(1) A1 HUBRAL, P.YR 1976 T1 SOME REMARKS ON COMPUTING TRAVEL TIMES IN PLANE LAYERED MEDIA* JF Geophysical Prospecting, VO 24 IS 4 SP 719 OP 724 DO https://doi.org/10.1111/j.1365-2478.1976.tb01568.x PB European Association of Geoscientists & Engineers, SN 1365-2478, AB Abstract A satisfactory approximation to the travel time of a reflected wave is achieved by finding a ray, which originates in the source and emerges close enough to the receiver. The reason for this is, that the actual travel time function can be approximated in every emergence point of the wave by a time function which is entirely defined by seismic parameters along the ray connecting the source with the point of emergence., UL https://www.earthdoc.org/content/journals/10.1111/j.1365-2478.1976.tb01568.x