@other{https://resolver.caltech.edu/CaltechETD:etd-06122008-082601,
    title = "A search for neutrinos from gravitational collapse with the MACRO experiment",
    year = "1997",
    url = "https://resolver.caltech.edu/CaltechETD:etd-06122008-082601",
    id = "record",
    doi = "10.7907/NTDF-3V84"
}