@article{1029002565, author = {Shalen, Peter B.}, title = {A torus theorem for regular branched covers of $S^3$.}, journal = {Michigan Math. J.}, volume = {28}, number = {1}, year = {1981}, pages = { 347-358}, language = {en}, url = {http://dml.mathdoc.fr/item/1029002565} }
Shalen, Peter B. A torus theorem for regular branched covers of $S^3$.. Michigan Math. J., Tome 28 (1981) no. 1, pp. 347-358. http://gdmltest.u-ga.fr/item/1029002565/