@other{https://resolver.caltech.edu/CaltechETD:etd-02072008-100242,
    title = "Nonlinear control of mechanical systems : a Riemannian geometry approach",
    url = "https://resolver.caltech.edu/CaltechETD:etd-02072008-100242",
    id = "record",
    doi = "10.7907/xrak-3409"
}