@article{https://authors.library.caltech.edu/records/0wq4z-dv964,
    author = "Fuller, F. Brock",
    title = "The writhing number of a space curve",
    year = "1971",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:FULpnas71",
    id = "https://authors.library.caltech.edu/records/0wq4z-dv964",
    issn = "0027-8424",
    volume = "68",
    number = "4",
    pages = "815-819"
}