%0 Journal Article
%A Niki, Satoru
%T Empirical Negation, Co-Negation and the Contraposition Rule II: Proof-Theoretical Investigations
%J Bulletin of the Section of Logic
%D 2020
%P 359-375
%V 49
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/BSL_2020_49_4_a2/
%G en
%F BSL_2020_49_4_a2