@unpublished{FreedenSchneider1998,
  author  = {Willi Freeden and F. Schneider},
  title   = {An integrated wavelet concept of physical geodesy},
  institution = {Fachbereich Mathematik},
  series    = {Berichte der Arbeitsgruppe Technomathematik (AGTM Report)},
  number    = {173},
  year    = {1998},
  url  = {http://nbn-resolving.de/urn:nbn:de:hbz:386-kluedo-5770},
}