TY  - BOOK
AU  - Indrzejczak Andrzej
TI  - Natural deduction, hybrid systems and modal logics
SN  - 978-90-481-8784-3
U1  - 511.3 
PY  - 2010///
CY  - New York
PB  - Springer-Verlag
KW  - Mathematical logic
KW  - Modality (Logic)
KW  - Symbolic logic
ER  -