@CONFERENCE\{IMM1989-03762,
    author       = "V. V. Vidal",
    title        = "The Role of Systems Analysis in environmental and natural Resources Management",
    year         = "1989",
    pages        = "11-21",
    booktitle    = "Conference on the Systems Analysis Approach to Environmental and Natural Resources Management, Poland",
    volume       = "",
    series       = "",
    editor       = "",
    publisher    = "",
    organization = "",
    address      = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/3762-full.html"
}