%0 Journal Article
%A J. D. Kečkić
%T An axiomatization of the propositional calculus and the completeness theorem
%J Matematički vesnik
%D 1968
%P 361 
%V 20
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MV_1968_20_3_a19/
%F MV_1968_20_3_a19