@ARTICLE{HekrdlaKlementNavara,
IS          = { zkontrolovano 31 Mar 2004 },
UPDATE      = { 2004-03-31 },
  AUTHOR =   {Hekrdla, Josef and Klement, Erich Peter and 
                  Navara, Mirko},
  TITLE =   {Two approaches to fuzzy propositional logics},
  importance =   {1},
  psurl    = { [PostScript] },
JOURNAL     = { Journal of Multiple-Valued Logic and Soft Computing },
VOLUME      = { 9 },
YEAR        = { 2003 },
NUMBER      = { 4 },
PAGES       = { 343--360 },
ISSN        = { 1542-3980 },
MONTH       = { December },
publisher   = { Old City Publishing },
address     = { Philadelphia, USA },
project     = { MSM 212300013, Action Austria-Czech Republic 23p16 },
authorship  = { 34-33-34 },
annote      = { We compare two approaches to fuzzy logics: R-fuzzy logics
    studied mainly by H\'ajek, and S-fuzzy logics introduced by
    Butnariu, Klement and Zafrany.  We improve some previous results
    and we discuss satisfiability, compactness and related questions
    in these logics. Special attention is paid to the comparison of
    their semantics. },
keywords    = { fuzzy logic, many-valued logic, Frank t-norm },
}