@article{Nicolas_Saubion_Stephan_IJAIT_01,
  author    = {P. Nicolas and F. Saubion and I. St{\'e}phan},
  title     = {{H}euristics for a {D}efault {L}ogic {R}easoning {S}ystem},
  journal   = {International Journal on Artificial Intelligence Tools},
  volume    = {10},
  number    = {4},
  year      = {2001},
  pages     = {503-523}
}