Geodesic
Covering Linkage Invariants
Canadian journal of mathematics, Tome 29 (1977) no. 6, pp. 1312-1339

Voir la notice de l'article provenant de la source Cambridge University Press

Let K be a knot in a manifold M. Corresponding to a representation of Π1(M — K) into a transitive group of permutations there is a branched covering space of M. K is covered by which may be a link of several components. The set of linking numbers between the various components of has long been recognised as a useful knot invariant. Bankwitz and Schumann used this invariant in considering dihedral coverings of Viergeflechte. 
Hartley, Richard; Murasugi, Kunio. Covering Linkage Invariants. Canadian journal of mathematics, Tome 29 (1977) no. 6, pp. 1312-1339. doi: 10.4153/CJM-1977-132-2
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