%0 Journal Article
%A Takács, Jozef
%T Positivity theorem
%J Communications in Mathematics
%D 1995
%P 67-70
%V 03
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/COMIM_1995__3_1_a7/
%G en
%F COMIM_1995__3_1_a7