%0 Journal Article %A N. I. Nagnibida %T Isomorphisms of analytic spaces that commute with differentiation %J Sbornik. Mathematics %D 1967 %P 221-231 %V 1 %N 2 %U http://geodesic.mathdoc.fr/item/SM_1967_1_2_a4/ %G en %F SM_1967_1_2_a4