@article{UBHD-67503478,
  author={Wielen, Roland and Lederle, Trudpert},
  title={Nachruf},
  subtitle={Walter Fricke},
  year={1989},
  pages={4-14},
  language={eng},
  volume={72},
  number={4},
  journal={Mitteilungen der Astronomischen Gesellschaft},
}
@article{UBHD-67502869,
  author={Wielen, Roland and Lederle, Trudpert},
  title={Obituary},
  subtitle={Walter Ernst Fricke (1915 - 1988)},
  year={1990},
  pages={515-517},
  language={eng},
  issn={0035-8738},
  volume={31},
  number={3},
  note={Gesehen am 26.11.2013},
  journal={The quarterly journal of the Royal Astronomical Society},
}