@article{DBLP:journals/tcs/DimopoulosT96,
  author    = {Yannis Dimopoulos and
               Alberto Torres},
  title     = {Graph Theoretical Structures in Logic Programs and Default
               Theories},
  journal   = {Theor. Comput. Sci.},
  volume    = {170},
  number    = {1-2},
  year      = {1996},
  pages     = {209-244},
  ee        = {http://dx.doi.org/10.1016/S0304-3975(96)80707-9},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}