@conference{UBHD-68086800,
  author={Ambos-Spies, Klaus and Bentzien, Levke and Fejer, Peter A. and Merkle, Wolfgang and Stephan, Frank},
  title={Collapsing polynomial-time degrees},
  year={2000},
  pages={1-24},
  language={eng},
  isbn={1-56881-113-6 and 1-56881-114-4 and 978-1-56881-113-0 and 978-1-56881-114-7},
}
@incollection{UBHD-69066023,
  author={Ambos-Spies, Klaus and Bentzien, Levke},
  title={Separating NP-completeness notions under strong hypotheses},
  year={1997},
  pages={121-127},
  language={eng},
  isbn={0818679077},
  booktitle={Proceedings / Twelfth Annual IEEE Conference on Computational Complexity; (formerly: Structure in Complexity Theory Conference)},
}
@book{UBHD-65139634,
  author={Bentzien, Levke},
  title={NP-completeness notions under strong hypotheses},
  year={1999},
  pages={88 Bl.},
  language={eng},
  school={Heidelberg, Univ., Diss., 2000},
  keywords={NP-vollst{\"a}ndiges Problem},
  library={UB [Signatur: 2000 T 11] ; MA [Signatur: Diss. Bentz]},
}
@book{UBHD-65248618,
  author={Bentzien, Levke},
  title={NP-completeness notions under strong hypotheses},
  year={2000},
  pages={Online-Ressource},
  language={eng},
  school={Heidelberg, Univ., Diss., 2000},
  keywords={Komplexit{\"a}tstheorie / Nichtdeterminismus / Vollst{\"a}ndigkeit},
  url={http://www.ub.uni-heidelberg.de/archiv/1384},
  library={UB},
}