%0 Journal Article
%A D. I. Gurevich
%T Elements of formal Lie theory and the Poincar\'e--Birkhoff--Witt theorem for generalized shift operators
%J Funkcionalʹnyj analiz i ego priloženiâ
%D 1986
%P 72-73
%V 20
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/FAA_1986_20_4_a10/
%G ru
%F FAA_1986_20_4_a10