@article{IM2_2001_65_2_a0,
     author = {V. V. Volchkov},
     title = {A~definitive version of the local two-radii theorem on hyperbolic spaces},
     journal = {Izvestiya. Mathematics },
     pages = {207--229},
     publisher = {mathdoc},
     volume = {65},
     number = {2},
     year = {2001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_2001_65_2_a0/}
}