@article{MZ_1992__211_3_174438,
     author = {Richard K. Skora},
     title = {Closed braids in 3-manifolds.},
     journal = {Mathematische Zeitschrift},
     pages = {173--188},
     publisher = {mathdoc},
     volume = {211},
     number = {3},
     year = {1992},
     zbl = {0758.57007},
     url = {http://geodesic.mathdoc.fr/item/MZ_1992__211_3_174438/}
}