@article{MVK_2019_10_a5,
     author = {B. A. Pogorelov and M. A. Pudovkina},
     title = {Characterization of mappings by the nonisometricity property},
     journal = {Matemati\v{c}eskie voprosy kriptografii},
     pages = {77--116},
     publisher = {mathdoc},
     volume = {10},
     year = {2019},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MVK_2019_10_a5/}
}