Hardness results for multicast cost sharing

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\begin{bibtex} @article{DBLP:journals/tcs/FeigenbaumKSS03,

 author    = {Joan Feigenbaum and
              Arvind Krishnamurthy and
              Rahul Sami and
              Scott Shenker},
 title     = {Hardness results for multicast cost sharing},
 journal   = {Theor. Comput. Sci.},
 volume    = {1-3},
 number    = {304},
 year      = {2003},
 pages     = {215-236},
 ee        = {http://dx.doi.org/10.1016/S0304-3975(03)00085-9},
 bibsource = {DBLP, http://dblp.uni-trier.de}

}

\end{bibtex}