@unpublished{AkramMichel2006,
  author  = {Muhammad Akram and Volker Michel},
  title   = {Locally Supported Approximate Identities on the Unit Ball},
  institution = {Fachbereich Mathematik},
  series    = {Schriften zur Funktionalanalysis und Geomathematik},
  number    = {30},
  year    = {2006},
  url  = {http://nbn-resolving.de/urn:nbn:de:hbz:386-kluedo-14809},
}