%0 Journal Article
%A Hempel, John
%T Homology of Branched Coverings of 3-Manifolds
%J Canadian journal of mathematics
%D 1991
%P 119-134
%V 44
%N 1
%U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1992-007-4/
%R 10.4153/CJM-1992-007-4
%F 10_4153_CJM_1992_007_4