%0 Journal Article
%A Pedersen, Steen
%T The Product of two (Unbounded) Derivations
%J Canadian mathematical bulletin
%D 1990
%P 345-348
%V 33
%N 3
%U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1990-058-0/
%R 10.4153/CMB-1990-058-0
%F 10_4153_CMB_1990_058_0