@article{FAA_1999_33_1_a10,
     author = {N. N. Nekhoroshev},
     title = {Exponential {Stability} of the {Approximate} {Principal} {Mode} of the {Nonlinear} {Wave} {Equation}},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {80--83},
     publisher = {mathdoc},
     volume = {33},
     number = {1},
     year = {1999},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1999_33_1_a10/}
}