@article{MAN_1992__293_4_164975,
     author = {Michael Farber},
     title = {Noncommutative rational functions and boundary links.},
     journal = {Mathematische Annalen},
     pages = {543--568},
     publisher = {mathdoc},
     volume = {293},
     number = {4},
     year = {1992},
     zbl = {0734.57005},
     url = {http://geodesic.mathdoc.fr/item/MAN_1992__293_4_164975/}
}