@article{MZM_1974_16_6_a2,
     author = {Yu. N. Frolov},
     title = {On a~uniqueness problem},
     journal = {Matemati\v{c}eskie zametki},
     pages = {871--878},
     publisher = {mathdoc},
     volume = {16},
     number = {6},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1974_16_6_a2/}
}