%0 Journal Article
%A Artikis, Theodore
%T An operator for characteristic functions
%J Portugaliae mathematica
%D 1983
%P 409-416
%V 42
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/PORMA_1983__42_4_115556/
%G en
%F PORMA_1983__42_4_115556