%0 Journal Article
%A S. Feferman
%T Classifications of recursive functions by means of hierarchies
%J Matematika
%D 1971
%P 137-158
%V 15
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MAT_1971_15_6_a5/
%G ru
%F MAT_1971_15_6_a5