@other{https://resolver.caltech.edu/CaltechTHESIS:04132011-101632415,
    title = "The interaction of subducting slabs and the 670 kilometer discontinuity",
    year = "1991",
    url = "https://resolver.caltech.edu/CaltechTHESIS:04132011-101632415",
    id = "record",
    doi = "10.7907/pme7-gx03"
}