@other{https://resolver.caltech.edu/CaltechETD:etd-08292007-104142,
    title = "Grid amplifiers",
    year = "1993",
    url = "https://resolver.caltech.edu/CaltechETD:etd-08292007-104142",
    id = "record",
    doi = "10.7907/19xw-he51"
}