@article{MZM_1971_9_5_a7,
     author = {K. K. Andreev},
     title = {The completion of solvable groups},
     journal = {Matemati\v{c}eskie zametki},
     pages = {543--550},
     year = {1971},
     volume = {9},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1971_9_5_a7/}
}