@unpublished{orgprints5962,
           title = {Use of range area, plumage condition and mortality},
          author = {L. Hegelund and J.T. S\orensen and J.E. Hermansen},
            year = {2005},
             url = {http://orgprints.org/5962/},
        abstract = {Use of range area, plumage condition and mortality.}
}