@other{https://resolver.caltech.edu/CaltechCDSTR:1995.CIT-CDS-94-006,
    title = "Differential Flatness and Absolute Equivalence",
    year = "2002",
    url = "https://resolver.caltech.edu/CaltechCDSTR:1995.CIT-CDS-94-006",
    id = "record"
}


@other{https://resolver.caltech.edu/CaltechCDSTR:1997.008,
    title = "Differentially flat nonlinear control systems",
    year = "1997",
    url = "https://resolver.caltech.edu/CaltechCDSTR:1997.008",
    id = "record"
}


@other{https://resolver.caltech.edu/CaltechCDSTR:1996.018,
    title = "Configuration Flatness of Lagrangian Systems Underactuated by One Control",
    year = "1996",
    url = "https://resolver.caltech.edu/CaltechCDSTR:1996.018",
    id = "record"
}


@other{https://resolver.caltech.edu/CaltechCDSTR:1996.CIT-CDS-96-006,
    title = "Configuration Flatness of Lagrangian Systems Underactuated by One Control",
    year = "1996",
    url = "https://resolver.caltech.edu/CaltechCDSTR:1996.CIT-CDS-96-006",
    id = "record"
}


@other{https://resolver.caltech.edu/CaltechCDSTR:1995.018,
    title = "A Test for Differential Flatness by Reduction to Single Input Systems",
    year = "1995",
    url = "https://resolver.caltech.edu/CaltechCDSTR:1995.018",
    id = "record"
}