TY  - JOUR
AU  - Karol Borsuk
TI  - Fundamental retracts and extensions of fundamental sequences
JO  - Fundamenta Mathematicae
PY  - 1969
SP  - 55
EP  - 85
VL  - 64
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/fm-64-1-55-85/
DO  - 10.4064/fm-64-1-55-85
LA  - en
ID  - 10_4064_fm_64_1_55_85
ER  -