%0 Journal Article
%A Henkin, Leon
%T Relativization with respect to formulas and its use in proofs of independence
%J Compositio Mathematica
%D 1968
%P 88-106
%V 20
%I Wolters-Noordhoff Publishing
%U http://www.numdam.org/item/CM_1968__20__88_0/
%G en
%F CM_1968__20__88_0