%0 Journal Article %A B. P. Alimpić %T On models of certain formulas of the predicate calculus of first order %J Matematički vesnik %D 1968 %P 347 %V 20 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/MV_1968_20_3_a16/ %F MV_1968_20_3_a16