@article{SM_1967_1_1_a6,
     author = {E. M. Zhmud'},
     title = {Finite groups with uniquely generated normal divisors},
     journal = {Sbornik. Mathematics},
     pages = {117--127},
     publisher = {mathdoc},
     volume = {1},
     number = {1},
     year = {1967},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1967_1_1_a6/}
}