@other{https://resolver.caltech.edu/CaltechETD:etd-08092007-085505,
    title = "Nonlinear uncertainty propagation in space trajectories",
    year = "1992",
    url = "https://resolver.caltech.edu/CaltechETD:etd-08092007-085505",
    id = "record",
    doi = "10.7907/4012-RF25"
}