@article{GDZPPN002089289, title = {Finitely Presented Subgroups of Three-Manifold Groups.}, journal = {Inventiones mathematicae}, volume = {14}, year = {1971}, pages = {335-346}, zbl = {0232.57003}, url = {http://dml.mathdoc.fr/item/GDZPPN002089289} }
Jaco, W. Finitely Presented Subgroups of Three-Manifold Groups.. Inventiones mathematicae, Tome 14 (1971) pp. 335-346. http://gdmltest.u-ga.fr/item/GDZPPN002089289/