@article{10_4153_CJM_1999_046_7,
     author = {Litherland, R. A.},
     title = {The {Homology} of {Abelian} {Covers} of {Knotted} {Graphs}},
     journal = {Canadian journal of mathematics},
     pages = {1035--1072},
     year = {1999},
     volume = {51},
     number = {5},
     doi = {10.4153/CJM-1999-046-7},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1999-046-7/}
}