@Inproceedings{EPTCS57.7,
  author    = {Seidel, Daniel and Voigtl\"ander, Janis},
  year      = {2011},
  title     = {Improvements for Free},
  editor    = {Massink, Mieke and Norman, Gethin},
  booktitle = {{\rm Proceedings Ninth Workshop on}
               Quantitative Aspects of Programming Languages,
               {\rm Saarbr\"ucken, Germany, April 1-3, 2011}},
  series    = {Electronic Proceedings in Theoretical Computer Science},
  volume    = {57},
  publisher = {Open Publishing Association},
  pages     = {89-103},
  doi       = {10.4204/EPTCS.57.7},
}