TY  - JOUR
AU  - Hoo, C. S.
TI  - Maps which Induce the Zero Map on Homotopy
JO  - Canadian journal of mathematics
PY  - 1968
SP  - 759
EP  - 768
VL  - 20
IS  - 1
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1968-076-7/
DO  - 10.4153/CJM-1968-076-7
ID  - 10_4153_CJM_1968_076_7
ER  -