@article{PDMA_2017_10_a8,
     author = {B. A. Pogorelov and M. A. Pudovkina},
     title = {On the anisometric index of a~transformation},
     journal = {Prikladnaya Diskretnaya Matematika. Supplement},
     pages = {25--27},
     publisher = {mathdoc},
     number = {10},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PDMA_2017_10_a8/}
}