@other{https://resolver.caltech.edu/CaltechTHESIS:12012011-112223883,
    title = "Nonlinear rigid block dynamics",
    year = "1995",
    url = "https://resolver.caltech.edu/CaltechTHESIS:12012011-112223883",
    id = "record",
    doi = "10.7907/2gsn-6v23"
}