@inbook{https://resolver.caltech.edu/CaltechAUTHORS:PREims99,
    title = "1999 IEEE MTT-S International Microwave Symposium Digest, Anaheim, CA, 13-19 June 1999",
    chapter = "Modelling of quasi-optical arrays",
    year = "1999",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:PREims99",
    id = "record",
    isbn = "0-7803-5135-5",
    doi = "10.1109/MWSYM.1999.779825"
}


@inbook{https://resolver.caltech.edu/CaltechAUTHORS:PREims97,
    title = "1997 IEEE MTT-S International Microwave Symposium Digest, Denver, CO, 8-13 June 1997",
    chapter = "A 43-GHz AlInAs/GaInAs/InP HEMT grid oscillator",
    year = "1997",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:PREims97",
    id = "record",
    isbn = "0-7803-3814-6",
    doi = "10.1109/MWSYM.1997.602983"
}