@article{EXMA_2001__10_3_51273,
     author = {Hulpke, Alexander},
     title = {Representing subgroups of finitely presented groups by quotient subgroups.},
     journal = {Experimental mathematics},
     pages = {369--381},
     publisher = {mathdoc},
     volume = {10},
     number = {3},
     year = {2001},
     zbl = {1062.20037},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EXMA_2001__10_3_51273/}
}