@other{https://resolver.caltech.edu/CaltechTHESIS:08182015-085203745,
    title = "Equivalent differential equations for nonlinear dynamical systems",
    url = "https://resolver.caltech.edu/CaltechTHESIS:08182015-085203745",
    id = "record",
    doi = "10.7907/4PEG-2Q54"
}