@article{CMH_1983__58_139927,
     author = {Lee Rudolph},
     title = {Braided surfaces and {Seifert} ribbons for closed braids.},
     journal = {Commentarii mathematici Helvetici},
     pages = {1--37},
     publisher = {mathdoc},
     volume = {58},
     year = {1983},
     zbl = {0522.57017},
     url = {http://geodesic.mathdoc.fr/item/CMH_1983__58_139927/}
}