\begin{thebibliography}{10}

\bibitem{alk-97}
Tariq Alkhalifah.
\newblock Velocity analysis using nonhyperbolic moveout in transversely
  isotropic media.
\newblock {\em Geophysics}, 62(6):1839--1854, 1997.

\bibitem{GEO60-05-15501566}
Tariq Alkhalifah and Ilya Tsvankin.
\newblock Velocity analysis for transversely isotropic media.
\newblock {\em Geophysics}, 60(5):1550--1566, 1995.

\bibitem{backus-equivalent-media}
George~E. Backus.
\newblock Long--wave elastic anisotropy produced by horizontal layering.
\newblock {\em Journal of Geophysical Research}, 67(11):4427--4440, 1962.

\bibitem{Berryman79}
J.G. Berryman.
\newblock Long--wave elastic anisotropy in transversely isotropic media.
\newblock {\em Geophysics}, 44:896--917, 1979.

\bibitem{GEO54-12-15641574}
B.~S. Byun, D.~Corrigan, and J.~E. Gaiser.
\newblock Anisotropic velocity analysis for lithology discrimination.
\newblock {\em Geophysics}, 54(12):1564--1574, 1989.

\bibitem{grechka-tsvankin}
V.~Grechka and I.~Tsvankin.
\newblock Feasibility of nonhyperbolic moveout inversion in transversely
  isotropic media.
\newblock {\em Geophysics}, 63(3):957--969, 1998.

\bibitem{ha:95a}
William~S. Harlan.
\newblock Flexible seismic traveltime tomography applied to diving waves.
\newblock {\em Stanford Exploration Project Report,
  http://sepwww.\urlbr{}stanford.edu/\urlbr{}research/\urlbr{}reports/\urlbr{}},
  89, 1995.

\bibitem{SEG-1991-1151}
Walt Lynn, A.~Gonz\'alez, and S.~Mackay.
\newblock Where are the fault--plane reflections?
\newblock In {\em 61st Annual International Meeting, SEG, Expanded Abstracts},
  volume~91, pages 1151--1154. Soc. Expl. Geophys., 1991.

\bibitem{GPR41-04-03810412}
R.~J. Michelena, F.~Muir, and J.~M. Harris.
\newblock Anisotropic traveltime tomography.
\newblock {\em Geophys. Prosp.}, 41(4):381--412, 1993.

\bibitem{GEO54-05-05810589}
M.~Schoenberg and F.~Muir.
\newblock A calculus for finely layered anisotropic media.
\newblock {\em Geophysics}, 54(5):581--589, 1989.
\newblock Discussion and reply by authors in GEO-56-4-572-576.

\bibitem{GEO51-10-19541966}
L.~Thomsen.
\newblock Weak elastic anisotropy.
\newblock {\em Geophysics}, 51(10):1954--1966, 1986.
\newblock Discussion in GEO-53-04-0558-0560 with reply by author.

\bibitem{GEO59-08-12901304}
I.~Tsvankin and L.~Thomsen.
\newblock Nonhyperbolic reflection moveout in anisotropic media.
\newblock {\em Geophysics}, 59(8):1290--1304, 1994.

\end{thebibliography}
