@article{MZ_1957__68_169722,
     author = {Gilbert Baumslag},
     title = {Finite {Factors} in {Infinite} {Ascending} {Derived} {Series.}},
     journal = {Mathematische Zeitschrift},
     pages = {465--478},
     publisher = {mathdoc},
     volume = {68},
     year = {1957},
     zbl = {0079.25302},
     url = {http://geodesic.mathdoc.fr/item/MZ_1957__68_169722/}
}