@unpublished{DeDonnoSchulze2008,
  author  = {G. De Donno and Bert-Wolfgang Schulze},
  title   = {Meromorphic symbolic structures for boundary value problems on manifolds with edges},
  institution = {Institut f{\"u}r Mathematik},
  series    = {Preprint},
  number    = {(2003) 10},
  year    = {2008},
}