@unpublished{Krainer2008,
  author  = {Thomas Krainer},
  title   = {The calculus of Volterra Mellin pseudodifferential operators with operator-valued symbols},
  institution = {Institut f{\"u}r Mathematik},
  series    = {Preprint},
  number    = {(2001) 35},
  year    = {2008},
}