@article{DAN_1991_317_2_a25,
     author = {I. G. Fikhtengol'ts},
     title = {On the conservation law for the {Kerr} space},
     journal = {Doklady Akademii Nauk},
     pages = {355--358},
     publisher = {mathdoc},
     volume = {317},
     number = {2},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1991_317_2_a25/}
}