%0 Journal Article
%A Crombez G.
%T Group theoretical methods 

 in Gray-scale mathematical morphology
%J Novi Sad Journal of Mathematics
%D 1990
%P 31-41
%V 20
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/NSJOM_1990_20_2a_3/
%F NSJOM_1990_20_2a_3