@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" }