@article{SM_1968_4_1_a8,
     author = {V. N. Lifshits},
     title = {On the existence of nonisomorphic nilpotent decompositions of nilpotent torsion-free groups},
     journal = {Sbornik. Mathematics},
     pages = {137--146},
     year = {1968},
     volume = {4},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1968_4_1_a8/}
}