@inbook{https://resolver.caltech.edu/CaltechAUTHORS:20181204-102730480,
    title = "Recycling Intergalactic and Interstellar Matter",
    chapter = "Molecular Gas in the Edge-On Galaxy NGC 4013",
    year = "2004",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:20181204-102730480",
    id = "record",
    isbn = "9781583811665",
    doi = "10.1017/S0074180900197359"
}


@inbook{https://resolver.caltech.edu/CaltechAUTHORS:20201117-175541343,
    title = "Submillimetre Astronomy",
    chapter = "Molecular spiral structure in M51",
    year = "1990",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:20201117-175541343",
    id = "record",
    isbn = "9789401568524",
    doi = "10.1007/978-94-015-6850-0\_91"
}