@unpublished{Taouil99,
  author = {Taouil, R. and Pasquier, N. and Bastide, Y. and Lakhal, L.},
  interhash = {a29f3256c9d97f1f0f4dc335960ec245},
  intrahash = {4a8ecd87087f09223035ab35f562736a},
  note = {Rapport de recherche.},
  title = {Computing closed sets lattices : Algorithms, applications and performances},
  year = 1999
}