%0 Journal Article %A Zarko Mijajlovic %T Quantifierfree Boolean Formulas and their Relation to Modal Logic S5 %J Mathematica balkanica %D 1988 %P 192 %V 2 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/MABA_1988_2_2_a9/ %F MABA_1988_2_2_a9