@inbook{https://resolver.caltech.edu/CaltechAUTHORS:20210322-145934778,
    title = "Superluminal radio sources : proceedings of a workshop in honor of Professor Marshall H. Cohen",
    chapter = "How fast can a blob go?",
    year = "1987",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:20210322-145934778",
    id = "record",
    isbn = "052134560X"
}