TY  - JOUR
AU  - M.A. Armstrong
TI  - Collars and Concordances of Topological Manifolds.
JO  - Commentarii mathematici Helvetici
PY  - 1970
SP  - 119
EP  - 128
VL  - 45
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMH_1970__45_139426/
ID  - CMH_1970__45_139426
ER  -