@article{CMH_1977__52_139691,
     author = {G. Baumslag and U. Stammbach},
     title = {On the inverse limit of free nilpotent groups.},
     journal = {Commentarii mathematici Helvetici},
     pages = {219--234},
     publisher = {mathdoc},
     volume = {52},
     year = {1977},
     zbl = {0418.20028},
     url = {http://geodesic.mathdoc.fr/item/CMH_1977__52_139691/}
}