@other{https://resolver.caltech.edu/CaltechETD:etd-02022006-081545,
    title = "Observations of Perfect Potential Flow and Critical Velocities in Superfluid Helium ll",
    url = "https://resolver.caltech.edu/CaltechETD:etd-02022006-081545",
    id = "record",
    doi = "10.7907/AA2G-EP61"
}