@book{nebel2012entwurf,
  author = {Nebel, Markus},
  title = {Entwurf und Analyse von Algorithmen},
  publisher = {Vieweg & Teubner},
  year = {2012},
  url = {http://d-nb.info/1018322566/04}
}

@book{goodrich2011structures,
  author = {Goodrich, Michael T. and Tamassia, Roberto},
  title = {Data structures and algorithms in Java},
  publisher = {Wiley},
  year = {2011},
  edition = {5. ed., internat. student version},
  url = {http://scans.hebis.de/HEBCGI/show.pl?22309560_toc.pdf}
}

@article{astrachan2003bubble,
  author = {Astrachan, O.},
  title = {Bubble Sort: An Archaeological Algorithmic Analysis},
  journal = {SIGCSE BULLETIN},
  year = {2003},
  volume = {35},
  number = {PART 1}
}