@ARTICLE\{IMM2001-0199,
    author       = "S. Lawrence and F. M. Coetzee and E. Glover and D. Pennock and G. W. Flake and F. {\AA}. Nielsen and R. Krovetz and A. Kruger and C. L. Giles",
    title        = "Persistence of Web References in Scientific Research",
    year         = "2001",
    month        = "feb",
    keywords     = "ResearchIndex, citation, Internet, links",
    pages        = "26-31",
    journal      = "{IEEE} Computer",
    volume       = "34",
    editor       = "",
    number       = "2",
    publisher    = "",
    url          = "http://www.neci.nec.com/~lawrence/papers/persistence-computer01/persistence-computer01.ps.gz"
}