@ARTICLE{KlementNavaraLukasiewicz,
  MYNOTE =   { S1995, A1995, P1997 },
  AUTHOR =   {Klement, Erich Peter and Navara, Mirko},
  TITLE =   {A characterization of tribes with respect to the
                  {\L}ukasiewicz $t$-norm},
  JOURNAL =   {Czechoslovak Math. J.},
  YEAR =   {1997},
  VOLUME =   {47 (122)},
  NUMBER =   {4},
  PAGES =   {689--700},
  importance =   {1},
  psurl =   {[PostScript,
                  k]},
}