1998: 
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(1)
Levshin, A.L., M.H. Ritzwoller, M.P. Barmin, L.I. Ratnikova, and C.A. Padgett, Automated surface
      wave analysis using phase-matched filters from dispersion maps, 20th Annual Seismic Research
      Symposium on Monitoring a CTBT, Proceedings, September 21-23, 1998.

(4) 
Ritzwoller, M.H., A.L. Levshin, L.I. Ratnikova, and A.A. Egorkin, Intermediate period group
      velocity maps across Central Asia, Western China, and parts of the Middle East, Geophys. J. Int.,
      134, 315-328, 1998. 

1999:
-----

(1)
James, M.B. and M.H. Ritzwoller, Feasibility of truncated perturbation expansions to approximate
      Rayleigh wave eigenfrequencies and eigenfunctions in heterogeneous media, Bull. Seism. Soc. Am.,
      89, 433-442, 1999.

(3)
Levshin, A.L., M.P. Barmin, and M.H. Ritzwoller, Evaluation of uncertainties and bias in surface
      wave tomographic maps and travel time correction surfaces, 21st Seismic Research Symposium,
      1999.

(6) 
Ritzwolller, M.H., A. Villasenor, A., A.L. Levshin, E.R., Engdahl, M.P. Barmin, W. Spakman, and J.
      Trampert, Construction of a 3-D P and S model of the crust and upper mantle to improve regional
      locations in W. China, Central Asia, and parts of the Middle East, 21st Seismic Research
      Symposium, 1999.

(7)
Vdovin, O.Y., A.L. Levshin, J.A. Rial, and M.H. Ritzwoller, Group velocity tomography of South
      America and the surrounding oceans, Geophys. J. Int., 136, 324-340, 1999. 


2000:
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(1)
Bondar, I. et al., Source specific station correction surfaces (SSSCs) for international monitoring system
      (IMS) seismic stations in N. Africa, N. East, and W. Asia, Proceedings of the 22nd Seismic Research
      Symposium for Monitoring a CTBT, New Orleans, LA, 10pp., 12 - 15 September, 2000. 

(2)
Levshin, A.L., M.H. Ritzwoller, B.G. Bukchin, A.Z. Mostinsky, and A.A. Egorkin, Isotropic and
      nonisotropic components of earthquakes and nuclear explosions on the Lop Nor test site, Proceedings
      of the 22nd Seismic Research Symposium for Monitoring a CTBT, New Orleans, LA, 10pp., 12 - 15
      September, 2000.

(4)
Ritzwoller, M.H. and A.L. Levshin, Estimating shallow shear velocities with marine multi-component
      seismic data, Proceedings of Seismic Inverse Methods for Complex Structures, 125 - 142, Center for
      Wave Phenomena, Vail, CO, 9 - 13 May, 2000. 

(5)
Ritzwoller, M.H., M.P. Barmin, A.L. Levshin, A. Villasenor, and E.R. Engdahl, Estimates of Pn and Sn
      across Eurasia, Proceedings of the 22nd Seismic Research Symposium for Monitoring a CTBT, New
      Orleans, LA, 10pp., 12 - 15 September, 2000. 

(6)
Villasenor, A., M.H. Ritzwoller, M.P. Barmin, E.R. Engdahl, and A.L. Levshin, Computation of travel
      times and station correction surfaces in Eurasia using 3-D velocity models, Proceedings of the 22nd
      Seismic Research Symposium for Monitoring a CTBT, New Orleans, LA, 10 pp., 12 - 15 September,
      2000.

2001:
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(5)
Levshin, A.L., and M.H. Ritzwoller, Surface waves in seismology and sesimic prospecting, Problems in
      dynamics of the lithosphere and seismicity, Computational Seismology, 32, Moscow, GEOS, 27-32,
      2001. (in Russian) 

(8)
Levshin, A.L., M.H. Ritzwoller, M.P. Barmin, and J. Stevens, Short period group velocity measurements
      and maps in Central Asia, Proceedings of the 23rd Seismic Research Review: Worldwide Monitoring of
      Nuclear Explosions, 258-269, Oct 2-5, 2001

(9)
McLaughlin, K, et al., Seismic location calibration in the Mediterranean, N. Africa, Middle East, and W.
      Eurasia, Proceedings of the 23rd Seismic Research Review: Worldwide Monitoring of Nuclear
      Explosions, 270-279, Oct 2-5, 2001. 

(13)
Shapiro, N.M., M.H. Ritzwoller, M. Barmin, P. Weichman, L. Tenorio, W. Navidi, Capturing
      uncertainties in source-specific station corrections derived from a 3-D model, Proceedings of the 23rd
      Seismic Research Review: Worldwide Monitoring of Nuclear Explosions, 395-403, Oct 2-5, 2001.

2002:
-----

(2)
Levshin, A.L. and M.H. Ritzwoller, Application of a global-scale 3-D model to improve regional
      locations, Stud. Geophys. Geod., in press. 

(3)
Lun, D.R., P.B. Weichman, M.H. Ritzwoller, and E.M. Lavely, Study of surface nuclear magnetic
      resonance inverse problems, J. Appl. Geophys., in press. 

(4)
Resovsky, J.S. and M.H. Ritzwoller, Assessing normal mode splitting functions above 3 mHz using
      along-branch coupling approximations, Geophys. J. Int., submitted. 

(9)
Villasenor, A., M.P. Barmin, M.H. Ritzwoller, and A.L. Levshin, Computation of regional travel times
      and station corrections for three-dimensional velocity models, Stud. Geophys. Geod., submitted.