@article{TMF_2009_160_1_a8,
     author = {R. I. Ivanov},
     title = {Equations of {the~Camassa--Holm} {Hierarchy}},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {93--101},
     publisher = {mathdoc},
     volume = {160},
     number = {1},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2009_160_1_a8/}
}