@InProceedings{nqa1991-abductive,
  x-todo =                   {publisher},
  author =                   {Mathieu, Philippe and Delahaye, Jean-Paul},
  title =                    {Abductive Reasoning in Three-valued Logic for Knowledge Bases},
  booktitle =                {Proceedings of the Workshop on Nonstandard Queries and Answers (NQA'91)},
  year =                     {1991},
  editor =                   {Demolombe, R. and Fariņas del Cerro, L. and Imielinski, T.},
  pages =                    {103-120},
  month =                    {Juillet},
  conference =               {NQA'90 -- Toulouse (France) -- Juillet 1991},
  genre =                    {workshopInternational},
  x-language =               {EN},
  x-international-audience = {Yes},
  x-country =                {FR},
  abstract =                 {No abstract}
}