1. The case for irreversible chemical stratification of the mantle;Int. Geol. Rev.,2002
2. Some elastic constant data on minerals relevant to geophysics;Rev. Geophys.,1968
3. Compositional mantle layering revealed by slab stagnation at ∼1,000-km depth;Sci. Adv.,2015
4. The current limits of resolution for surface wave tomography in North America;EOS, Trans. Am. geophys. Un.,2000
5. The problem of the Earth's density variations;Bull. seism. Soc. Am.,1940