@ARTICLE\{IMM2001-0158,
    author       = "J. A. Tuszynski and J. Middleton and P. L. Christiansen and J. M. Dixon",
    title        = "Exact eigenfunctions  of the linear ramp potential in theGross-Pitaevskii equation for the Bose-Einstein condensate",
    year         = "2001",
    pages        = "220-225",
    journal      = "Physics Letters A",
    volume       = "291",
    editor       = "",
    number       = "",
    publisher    = "",
    note         = "P 728",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/158-full.html"
}