@article{MZM_1977_22_1_a13,
     author = {B. M. Levitan},
     title = {Another method for computing the densities of integrals of motion for the {Korteweg--de} {Vries} equation},
     journal = {Matemati\v{c}eskie zametki},
     pages = {129--135},
     publisher = {mathdoc},
     volume = {22},
     number = {1},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1977_22_1_a13/}
}