%0 Journal Article
%A Hartley, Richard
%A Murasugi, Kunio
%T Covering Linkage Invariants
%J Canadian journal of mathematics
%D 1977
%P 1312-1339
%V 29
%N 6
%U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1977-132-2/
%R 10.4153/CJM-1977-132-2
%F 10_4153_CJM_1977_132_2