@article{SM_1976_29_1_a3,
     author = {G. V. Radzievskii},
     title = {On the completeness of derived chains},
     journal = {Sbornik. Mathematics},
     pages = {35--54},
     publisher = {mathdoc},
     volume = {29},
     number = {1},
     year = {1976},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1976_29_1_a3/}
}