@Proceedings{abn2004,
  Title                    = abn,
  Year                     = {2004},

  Address                  = {Berlin},
  Editor                   = {J. A. G{\'a}mez and S. Moral and A. Salmer{\'o}n},
  Publisher                = {Springer},
  Series                   = {Studies in Fuzziness and Soft Computing},
  Volume                   = {146},

  Booktitle                = abn
}