TY  - JOUR
AU  - Cherenack, Paul
TI  - Basic Objects for an Algebraic Homotopy Theory
JO  - Canadian journal of mathematics
PY  - 1972
SP  - 155
EP  - 166
VL  - 24
IS  - 1
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1972-014-6/
DO  - 10.4153/CJM-1972-014-6
ID  - 10_4153_CJM_1972_014_6
ER  -