%0 Journal Article
%A Andrzej Zajtz
%T On the order of natural differential operators and liftings
%J Annales Polonici Mathematici
%D 1988
%P 169-178
%V 49
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/ap-49-2-169-178/
%R 10.4064/ap-49-2-169-178
%G en
%F 10_4064_ap_49_2_169_178