@other{https://resolver.caltech.edu/CaltechTHESIS:07292014-111212753,
    title = "Optimal procurement and contracting with research and development",
    year = "1990",
    url = "https://resolver.caltech.edu/CaltechTHESIS:07292014-111212753",
    id = "record",
    doi = "10.7907/ccg7-br11"
}