@CONFERENCE\{IMM2000-01160,
    author       = "O. Bang and T. W. Graversen and C. B. Clausen",
    title        = "Effective nonlinearities and multi-wavelength second-harmonic generation in modulated quasi-phase-matching gratings",
    year         = "2000",
    pages        = "162-164",
    booktitle    = "Nonlinear Optics: Materials, Fundamentals and Applications, {OSA} Technical Digest",
    volume       = "",
    series       = "",
    editor       = "",
    publisher    = "Optical Society of America",
    organization = "",
    address      = "Washington {DC}",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/1160-full.html"
}