@article{HerbstKappKrummeletal.1998,
  author    = {Herbst, R. and Kapp, Ingo and Krummel, H. and L{\"u}ck, Erika},
  title     = {Seismic sources for shallow investigatons : a field comparison from Northern Germany},
  year      = {1998},
  language  = {en}
}
@article{BlumensteinSchubertBechmannetal.1997,
  author    = {Blumenstein, Oswald and Schubert, Oswald and Bechmann, Wolfgang and Bukowsky, Heinz and Dautz, J. and Kapp, Ingo and Kn{\"o}sche, R{\"u}diger and Portmann, Hans-Dieter and Schachtzabel, Hartmut and Schneider, Ingo and Tessmann, Joachim},
  title     = {Erste Ergebnisse einer Fallstudie zur Stoffdynamik naturschutzrelevanter B{\"o}den der D{\"o}beritzer Heide},
  year      = {1997},
  language  = {de}
}