TY  - JOUR
AU  - Nowak, Marek
TI  - A Syntactic Approach to Closure Operation
JO  - Bulletin of the Section of Logic
PY  - 2017
VL  - 46
IS  - 3-4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/BSL_2017_46_3-4_a0/
LA  - en
ID  - BSL_2017_46_3-4_a0
ER  -