@article{IM2_1977_11_1_a0,
     author = {Yu. V. Kuz'min},
     title = {Free center-by-metabelian groups, {Lie} algebras, and $\mathscr D$-groups},
     journal = {Izvestiya. Mathematics},
     pages = {1--30},
     year = {1977},
     volume = {11},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1977_11_1_a0/}
}