@other{https://authors.library.caltech.edu/records/pp9f4-mka51,
    author = "Burdick, L. J. and Garnero, E. J. and Saikia, C. K. and Helmberger, D. V.",
    title = "Time Domain Regional Discriminants",
    year = "1991",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:20191101-084920369",
    id = "https://authors.library.caltech.edu/records/pp9f4-mka51"
}


@other{https://authors.library.caltech.edu/records/h2zq1-f2s15,
    author = "Helmberger, Donald V. and Jennings, Paul C.",
    title = "Strong ground motion : N.S.F. Seminar-Workshop Proceedings",
    year = "1978",
    url = "https://resolver.caltech.edu/CaltechEERL:EERL.1978.002",
    id = "https://authors.library.caltech.edu/records/h2zq1-f2s15"
}