TY  - DATA
AU  - Dov M. Gabbay, Heinrich Wansing
TI  - What is Negation?
SN  - 9789401593090
PY  - 1999///
PB  - Springer Netherlands
KW  - Mathematics and Statistics
UR  - https://doi.org/10.1007/978-94-015-9309-0
ER  -