@inproceedings{DBLP:conf/wads/KarpinskiMOZ03,
  author    = {Marek Karpinski and
               Ion I. Mandoiu and
               Alexander Olshevsky and
               Alexander Zelikovsky},
  title     = {Improved Approximation Algorithms for the Quality of Service
               Steiner Tree Problem},
  booktitle = {WADS},
  year      = {2003},
  pages     = {401-411},
  ee        = {http://dx.doi.org/10.1007/978-3-540-45078-8_35},
  crossref  = {DBLP:conf/wads/2003},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}

@proceedings{DBLP:conf/wads/2003,
  editor    = {Frank K. H. A. Dehne and
               J{\"o}rg-R{\"u}diger Sack and
               Michiel H. M. Smid},
  title     = {Algorithms and Data Structures, 8th International Workshop,
               WADS 2003, Ottawa, Ontario, Canada, July 30 - August 1,
               2003, Proceedings},
  booktitle = {WADS},
  publisher = {Springer},
  series    = {Lecture Notes in Computer Science},
  volume    = {2748},
  year      = {2003},
  isbn      = {3-540-40545-3},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}