@article{MZM_2011_90_5_a6,
     author = {A. Yu. Savin},
     title = {On the {Index} of {Nonlocal} {Elliptic} {Operators} {Corresponding} to a {Nonisometric} {Diffeomorphism}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {712--726},
     publisher = {mathdoc},
     volume = {90},
     number = {5},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2011_90_5_a6/}
}