@other{https://resolver.caltech.edu/CaltechTHESIS:08172011-135421197,
    title = "A Study of Dispersion in Plasmas",
    url = "https://resolver.caltech.edu/CaltechTHESIS:08172011-135421197",
    id = "record",
    doi = "10.7907/W2HJ-XE62"
}


@other{https://resolver.caltech.edu/CaltechETD:etd-03232006-141908,
    title = "Bandwidth Limitations and Synthesis Procedures for Negative Resistance and Variable Reactance Amplifiers",
    url = "https://resolver.caltech.edu/CaltechETD:etd-03232006-141908",
    id = "record",
    doi = "10.7907/NF7W-1K08"
}