@unpublished{AirapetyanWitt2008,
  author  = {Ruben Airapetyan and Ingo Witt},
  title   = {Isometric properties of the Hankel Transformation in weighted sobolev spaces},
  institution = {Institut f{\"u}r Mathematik},
  series    = {Preprint},
  number    = {(1997) 14},
  year    = {2008},
}