@other{https://resolver.caltech.edu/CaltechETD:etd-02082008-160817,
    title = "Dynamical signatures of gearbox vibrations",
    url = "https://resolver.caltech.edu/CaltechETD:etd-02082008-160817",
    id = "record",
    doi = "10.7907/ab9t-b513"
}