TY  - JOUR
AU  - Luedeman, John K.
TI  - Closure operations and semigroups of quotients
JO  - Commentationes Mathematicae Universitatis Carolinae
PY  - 1979
SP  - 529
EP  - 537
VL  - 20
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMUC_1979__20_3_a10/
LA  - en
ID  - CMUC_1979__20_3_a10
ER  -