%0 Journal Article
%A Harvey Friedman
%T Minimality in the ${Δ^1}_2$-degrees
%J Fundamenta Mathematicae
%D 1973
%P 183-192
%V 81
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/fm-81-3-183-192/
%R 10.4064/fm-81-3-183-192
%G en
%F 10_4064_fm_81_3_183_192