@unpublished{FenglerFreedenKohlhaasetal.2005,
  author  = {Martin J. Fengler and Willi Freeden and Annika Kohlhaas and Volker Michel and Thomas Peters},
  title   = {Wavelet Modelling of Regional and Temporal Variations of the Earth´s Gravitational Potential},
  institution = {Fachbereich Mathematik},
  series    = {Schriften zur Funktionalanalysis und Geomathematik},
  number    = {21},
  year    = {2005},
  url  = {http://nbn-resolving.de/urn:nbn:de:hbz:386-kluedo-13763},
}