@INPROCEEDINGS{HekrdlaKlementNavaraPropositional,
  MYNOTE =   { S1997, A1997, P1998 },
  IS =     {zkontrolovano 09 Jan 99},
  AUTHOR =   {Hekrdla, Josef and Klement, Erich Peter and Navara,
                  Mirko},
  EDITOR =   {E.P.~Klement},
  TITLE =   {Fuzzy propositional logic with infinite operations},
  BOOKTITLE =   {Abstr. 4th Int. Conf. Fuzzy Sets Theory Appl.},
  PUBLISHER =   {Military Academy},
  ADDRESS =   {Liptovsk\'y Mikul\'a{\v s}, Slovakia},
  YEAR =   {1998},
  MONTH =   {February},
  day =     {2--6},
  PAGES =   {54},
  book_pages =   {117},
  venue =   {Liptovsk\'y J\'an, Slovakia},
  psurl =   {[PostScript,
                  31k]},
}