@article{https://resolver.caltech.edu/CaltechAUTHORS:LEWsiamr99,
    title = "Configuration Controllability of Simple Mechanical Control Systems",
    journal = "SIAM Review",
    year = "1999",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:LEWsiamr99",
    id = "record",
    issn = "0036-1445",
    doi = "10.1137/S0036144599351065",
    volume = "41"
}


@article{https://resolver.caltech.edu/CaltechAUTHORS:LEWsiamjco97,
    title = "Configuration Controllability of Simple Mechanical Control Systems",
    journal = "SIAM Journal on Control and Optimization",
    year = "1997",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:LEWsiamjco97",
    id = "record",
    issn = "0363-0129",
    doi = "10.1137/S0363012995287155",
    volume = "35"
}