@article{MZ_1964__83_170208,
     author = {Gilbert Baumslag},
     title = {On a problem of {Plotkin} concerning locally nilpotent groups.},
     journal = {Mathematische Zeitschrift},
     pages = {25--26},
     publisher = {mathdoc},
     volume = {83},
     year = {1964},
     zbl = {0124.26202},
     url = {http://geodesic.mathdoc.fr/item/MZ_1964__83_170208/}
}