@article{https://authors.library.caltech.edu/records/x9mer-w6k39,
    author = "Kohler, Monica D. and Heaton, Thomas H. and Bradford, Samuel C.",
    title = "Propagating waves in the steel, moment-frame factor building recorded during earthquakes",
    year = "2007",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:KOHbssa07",
    id = "https://authors.library.caltech.edu/records/x9mer-w6k39",
    issn = "0037-1106",
    doi = "10.1785/0120060148",
    volume = "97",
    number = "4",
    pages = "1334-1345"
}


@article{https://authors.library.caltech.edu/records/pxezy-na460,
    author = "Clinton, John F. and Bradford, S. Case and Heaton, Thomas H. and Favela, Javier",
    title = "The Observed Wander of the Natural Frequencies in a Structure",
    year = "2006",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:20121120-092458419",
    id = "https://authors.library.caltech.edu/records/pxezy-na460",
    issn = "0037-1106",
    doi = "10.1785/0120050052",
    volume = "96",
    number = "1",
    pages = "237-257"
}