@ARTICLE\{IMM2002-01651,
    author       = "S. Flach and Y. Zolotaryuk and A. E. Miroshnichenko and M. V. Fistul",
    title        = "Broken Symmetries and Directed Collective Energy Transport in Spatially Extended Systems",
    year         = "2002",
    pages        = "1-4/18401",
    journal      = "Physical Review Letters",
    volume       = "88",
    editor       = "",
    number       = "18",
    publisher    = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/1651-full.html"
}