@unpublished{Alessandrini1985,
  author  = {G. Alessandrini},
  title   = {Some Remarks on a problem of sound measurements from incomplete data},
  institution = {Fachbereich Mathematik},
  series    = {Berichte der Arbeitsgruppe Technomathematik (AGTM Report)},
  number    = {17},
  year    = {1985},
  url  = {http://nbn-resolving.de/urn:nbn:de:hbz:386-kluedo-5739},
}