Authors: Kendall, M Helffrich, G

Citation: M. Kendall et G. Helffrich, SPICeD: imaging the deep Earth, ASTRON GEOP, 42(3), 2001, pp. 26-29

Authors: Helffrich, G

Citation: G. Helffrich, Topography of the transition zone seismic discontinuities, REV GEOPHYS, 38(1), 2000, pp. 141-158

Authors: Restivo, A Helffrich, G

Citation: A. Restivo et G. Helffrich, Teleseismic shear wave splitting measurements in noisy environments, GEOPHYS J I, 137(3), 1999, pp. 821-830

Authors: Kaneshima, S Helffrich, G

Citation: S. Kaneshima et G. Helffrich, Dipping low-velocity layer in the mid-lower mantle: Evidence for geochemical heterogeneity, SCIENCE, 283(5409), 1999, pp. 1888-1891

Authors: Helffrich, G

Citation: G. Helffrich, Practical use of Suzuki's thermal expansivity formulation, PHYS E PLAN, 116(1-4), 1999, pp. 133-136