TY  - JOUR
AU  - Joel Hass
AU  - Peter Scott
TI  - Homotopy and isotopy in dimension three.
JO  - Commentarii mathematici Helvetici
PY  - 1993
SP  - 341
EP  - 364
VL  - 68
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMH_1993__68_2_140307/
ID  - CMH_1993__68_2_140307
ER  -