TY  - JOUR
AU  - B. Węglorz
TI  - Some preservation theorems
JO  - Colloquium Mathematicum
PY  - 1967
SP  - 269
EP  - 276
VL  - 17
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/cm-17-2-269-276/
DO  - 10.4064/cm-17-2-269-276
LA  - en
ID  - 10_4064_cm_17_2_269_276
ER  -