%0 Journal Article
%A Niki, Satoru
%T Empirical Negation, Co-negation and Contraposition Rule I: Semantical Investigations
%J Bulletin of the Section of Logic
%D 2020
%P 231-253
%V 49
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/BSL_2020_49_3_a1/
%G en
%F BSL_2020_49_3_a1