@other{https://resolver.caltech.edu/CaltechCSTR:1981.4029-tr-81,
    title = "Structure, placement and modelling",
    year = "1981",
    url = "https://resolver.caltech.edu/CaltechCSTR:1981.4029-tr-81",
    id = "record",
    doi = "10.7907/kq6fj-72673"
}