%0 Journal Article
%A Michel, Horst
%T Generation of operation-invariant classes of sets
%J Mathematica slovaca
%D 1983
%P 257-268
%V 33
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MASLO_1983__33_3_a2/
%G en
%F MASLO_1983__33_3_a2