@article{DBLP:journals/algorithmica/CabelloHKS10,
  author    = {Sergio Cabello and
               Herman J. Haverkort and
               Marc J. van Kreveld and
               Bettina Speckmann},
  title     = {Algorithmic Aspects of Proportional Symbol Maps},
  journal   = {Algorithmica},
  volume    = {58},
  number    = {3},
  year      = {2010},
  pages     = {543-565},
  ee        = {http://dx.doi.org/10.1007/s00453-009-9281-8},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}