@article{DAN_1967_176_3_a4,
     author = {D. I. Zaitsev},
     title = {Stably solvable and stably nilpotent groups},
     journal = {Doklady Akademii Nauk},
     pages = {509--511},
     publisher = {mathdoc},
     volume = {176},
     number = {3},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1967_176_3_a4/}
}