%0 Journal Article
%A Hartley, Richard
%T Knots with Free Period
%J Canadian journal of mathematics
%D 1981
%P 91-102
%V 33
%N 1
%U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1981-009-7/
%R 10.4153/CJM-1981-009-7
%F 10_4153_CJM_1981_009_7