@Unpublished{wrf-localtopo-92,
    author = "Franklin, WR",
    title = "Local topological properties of polyhedra",
    month = "Sept",
    year = "1992",
    note = "(unpublished talk)",
    mykey = "topology",
    abstract = "What various data structures are possible to represent polygons and polyhedra? Having only local information about the location and neighborhood of each vertex is sufficient, and surprisingly useful.",
    url = "https://wrfranklin.org/wiki/Research/unpub/localtopo.pdf"
}