@article{DAN_1973_213_2_a3,
     author = {L. G. Gurov},
     title = {On the stability of {Lorentz} mappings},
     journal = {Doklady Akademii Nauk},
     pages = {267--269},
     publisher = {mathdoc},
     volume = {213},
     number = {2},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1973_213_2_a3/}
}