@other{https://resolver.caltech.edu/CaltechETD:etd-05022008-113526,
    title = "Activity in the Crab Nebula",
    url = "https://resolver.caltech.edu/CaltechETD:etd-05022008-113526",
    id = "record",
    doi = "10.7907/4E5Y-0V49"
}