@unpublished{ManicciaSchulze2008,
  author  = {L. Maniccia and Bert-Wolfgang Schulze},
  title   = {An algebra of meromorphic corner symbols},
  institution = {Institut f{\"u}r Mathematik},
  series    = {Preprint},
  number    = {(2002) 18},
  year    = {2008},
}