%0 Journal Article %A Boileau, Michel %A Flapan, Erica %T Uniqueness of Free Actions on S 3 Respecting a Knot %J Canadian journal of mathematics %D 1987 %P 969-982 %V 39 %N 4 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1987-049-3/ %R 10.4153/CJM-1987-049-3 %F 10_4153_CJM_1987_049_3