@article{ScherbaumSchmidtke2001,
  author    = {Scherbaum, Frank and Schmidtke, E.},
  title     = {Digital seismology tutor},
  year      = {2001},
  language  = {en}
}
@book{Scherbaum2001,
  author    = {Scherbaum, Frank},
  title     = {Of poles and zeros : fundamentals of digital seismology},
  series = {Modern approaches in geophysics},
  volume    = {15},
  journal   = {Modern approaches in geophysics},
  edition   = {Rev. 2. ed., reprint with corr},
  publisher = {Springer},
  address   = {Dordrecht},
  isbn      = {0-7923-6834-7},
  pages     = {265 p.},
  year      = {2001},
  language  = {en}
}