@ARTICLE{NavaraTribes,
  MYNOTE =   { P1993 },
  AUTHOR =   {Navara, Mirko},
  TITLE =   {A characterization of triangular norm based tribes},
  JOURNAL =   { Tatra Mountains Mathematical Publications },
  Publisher =   {Matematick{\'y} {\'u}stav {SAV}},
  Address =   {Bratislava, Slovakia},
  ISSN =   {1210-3195},
  YEAR =   {1993},
  VOLUME =   {3},
  PAGES =   {161--166},
}