%0 Journal Article
%A R. Routley
%T A Semantical Analysis of Implicational System I and of the First Degree of Entailment.
%J Mathematische Annalen
%D 1972
%P 58-84
%V 196
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MAN_1972__196_162243/
%F MAN_1972__196_162243