@article{DBLP:journals/eor/MatiX04,
  author    = {Yazid Mati and
               Xiaolan Xie},
  title     = {The complexity of two-job shop problems with multi-purpose
               unrelated machines},
  journal   = {European Journal of Operational Research},
  volume    = {152},
  number    = {1},
  year      = {2004},
  pages     = {159-169},
  ee        = {http://dx.doi.org/10.1016/S0377-2217(02)00675-6},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}