TY  - JOUR
AU  - Hanna Patkowska
TI  - A homotopy extension theorem for fundamental sequences
JO  - Fundamenta Mathematicae
PY  - 1969
SP  - 87
EP  - 89
VL  - 64
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/fm-64-1-87-89/
DO  - 10.4064/fm-64-1-87-89
LA  - en
ID  - 10_4064_fm_64_1_87_89
ER  -