TY  - JOUR
AU  - Hartley, Richard
TI  - Knots with Free Period
JO  - Canadian journal of mathematics
PY  - 1981
SP  - 91
EP  - 102
VL  - 33
IS  - 1
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1981-009-7/
DO  - 10.4153/CJM-1981-009-7
ID  - 10_4153_CJM_1981_009_7
ER  -