@unpublished{NazaikinskiiSavinSchulzeetal.2008,
  author  = {Vladimir Nazaikinskii and Anton Savin and Bert-Wolfgang Schulze and Boris Sternin},
  title   = {Differential operators on manifolds with singularities : analysis and topology : Chapter 7: The index problem on manifolds with singularities},
  institution = {Institut f{\"u}r Mathematik},
  series    = {Preprint},
  number    = {(2004) 06},
  year    = {2008},
}