@article{10_4153_CMB_2003_037_6,
     author = {Ishiwata, Makiko and Przytycki, J\'ozef H. and Yasuhara, Akira},
     title = {Branched {Covers} of {Tangles} in {Three-balls}},
     journal = {Canadian mathematical bulletin},
     pages = {356--364},
     year = {2003},
     volume = {46},
     number = {3},
     doi = {10.4153/CMB-2003-037-6},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-2003-037-6/}
}