TY  - JOUR
AU  - Frank Wattenberg
TI  - Differentiable Motions of Unknotted, Unlinked Circles in 3-Space.
JO  - Mathematica Scandinavica
PY  - 1972
SP  - 107
EP  - 135
VL  - 30
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MS2_1972__30_166227/
ID  - MS2_1972__30_166227
ER  -