@other{https://resolver.caltech.edu/CaltechTHESIS:08042017-154857683,
    title = "Some Aspects of the Quantization of Theories with a Gauge Invariance",
    url = "https://resolver.caltech.edu/CaltechTHESIS:08042017-154857683",
    id = "record",
    doi = "10.7907/hf4w-dw98"
}