@unpublished{SchulzeTarkhanov2008,
  author  = {Bert-Wolfgang Schulze and Nikolai Nikolaevich Tarkhanov},
  title   = {Ellipticity and parametrices on manifolds with caspidal edges},
  institution = {Institut f{\"u}r Mathematik},
  series    = {Preprint},
  number    = {(1999) 04},
  year    = {2008},
}