@article{RM_1990_45_1_a11,
     author = {B. A. Khesin},
     title = {Invariants of {Hamiltonian} {KdV-structures}},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {209--210},
     publisher = {mathdoc},
     volume = {45},
     number = {1},
     year = {1990},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1990_45_1_a11/}
}