@article{10_4153_CJM_1987_049_3,
     author = {Boileau, Michel and Flapan, Erica},
     title = {Uniqueness of {Free} {Actions} on {S} 3 {Respecting} a {Knot}},
     journal = {Canadian journal of mathematics},
     pages = {969--982},
     year = {1987},
     volume = {39},
     number = {4},
     doi = {10.4153/CJM-1987-049-3},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1987-049-3/}
}