%0 Journal Article
%A Đ. Kurepa
%T On some coupled operators in ordered sets
%J Matematički vesnik
%D 1953
%P 15 
%V 5
%N 3-4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MV_1953_5_3-4_a1/
%F MV_1953_5_3-4_a1