@inbook{16815,
  author       = {{Klein, P. and Meyer auf der Heide, Friedhelm}},
  booktitle    = {{GI - 10. Jahrestagung}},
  isbn         = {{9783540103882}},
  issn         = {{0343-3005}},
  title        = {{{Untere Zeitschranken für das Rucksack-Problem}}},
  doi          = {{10.1007/978-3-642-67838-7_34}},
  year         = {{1980}},
}

@article{16812,
  author       = {{Meyer auf der Heide, Friedhelm}},
  journal      = {{Automata, Languages and Programming. ICALP 1979}},
  pages        = {{411--421}},
  title        = {{{A comparison of two variations of a pebble game on graphs}}},
  doi          = {{10.1007/3-540-09510-1_32 }},
  year         = {{1979}},
}