TY  - JOUR
AU  - Niki, Satoru
TI  - Empirical Negation, Co-negation and Contraposition Rule I: Semantical Investigations
JO  - Bulletin of the Section of Logic
PY  - 2020
SP  - 231
EP  - 253
VL  - 49
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/BSL_2020_49_3_a1/
LA  - en
ID  - BSL_2020_49_3_a1
ER  -