TY  - JOUR
AU  - Mather, Michael
TI  - Pull-Backs in Homotopy Theory
JO  - Canadian journal of mathematics
PY  - 1976
SP  - 225
EP  - 263
VL  - 28
IS  - 2
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1976-029-0/
DO  - 10.4153/CJM-1976-029-0
ID  - 10_4153_CJM_1976_029_0
ER  -