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    year = "2002",
    url = "https://resolver.caltech.edu/CaltechCDSTR:1995.CIT-CDS-94-006",
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@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"
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@other{https://resolver.caltech.edu/CaltechCDSTR:1996.018,
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    year = "1996",
    url = "https://resolver.caltech.edu/CaltechCDSTR:1996.018",
    id = "record"
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    url = "https://resolver.caltech.edu/CaltechCDSTR:1996.CIT-CDS-96-006",
    id = "record"
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    year = "1995",
    url = "https://resolver.caltech.edu/CaltechCDSTR:1995.018",
    id = "record"
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@inbook{https://resolver.caltech.edu/CaltechAUTHORS:20190319-091908577,
    title = "Proceedings of 1994 33rd IEEE Conference on Decision and Control",
    chapter = "Differential flatness and absolute equivalence",
    year = "1994",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:20190319-091908577",
    id = "record",
    isbn = "0-7803-1968-0",
    doi = "10.1109/CDC.1994.410908"
}