1. Über periodische Knoten;Burde, Gerhard;Arch. Math. (Basel),1978
2. Signatures of covering links;Gordon, C. McA.;Canadian J. Math.,1981
3. New proofs of two theorems on periodic knots;Hillman, Jonathan A.;Arch. Math. (Basel),1981
4. Zyklische Knoten;Lüdicke, Ulrich;Arch. Math. (Basel),1979
5. On periodic knots;Murasugi, Kunio;Comment. Math. Helv.,1971