@other{https://resolver.caltech.edu/CaltechTHESIS:01252013-171305685,
    title = "Current Transport and Onset-Related Phenomena in an MPD Thruster Modified by Applied Magnetic Fields",
    url = "https://resolver.caltech.edu/CaltechTHESIS:01252013-171305685",
    id = "record",
    doi = "10.7907/39VT-GB93"
}


@other{https://resolver.caltech.edu/CaltechTHESIS:05312012-113856351,
    title = "Plasma-Surface Interactions in Hollow Cathode Discharges for Electric Propulsion
 ",
    url = "https://resolver.caltech.edu/CaltechTHESIS:05312012-113856351",
    id = "record",
    doi = "10.7907/7TDQ-DR81"
}


@other{https://resolver.caltech.edu/CaltechETD:etd-05232005-162628,
    title = "Discharge Plasma Processes of Ring-Cusp Ion Thrusters",
    url = "https://resolver.caltech.edu/CaltechETD:etd-05232005-162628",
    id = "record",
    doi = "10.7907/VKKE-PC20"
}