TY  - JOUR
AU  - Niki, Satoru
TI  - Empirical Negation, Co-Negation and the Contraposition Rule II: Proof-Theoretical Investigations
JO  - Bulletin of the Section of Logic
PY  - 2020
SP  - 359
EP  - 375
VL  - 49
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/BSL_2020_49_4_a2/
LA  - en
ID  - BSL_2020_49_4_a2
ER  -