@ARTICLE\{IMM2000-01947,
    author       = "O. Bang and C. B. Clausen",
    title        = "Effective nonlinearities in modulated {QPM} gratings",
    year         = "2000",
    pages        = "5-6",
    journal      = "{DOPS} Nyt - Danish Optical Society News, Special issue on Northern Optics",
    volume       = "15",
    editor       = "",
    number       = "",
    publisher    = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/1947-full.html"
}