@article{MZM_1991_49_6_a5,
     author = {S. Yu. Dobrokhotov and I. M. Krichever},
     title = {Multi-phase solutions of the {Benjamin--Ono} equation and their averaging},
     journal = {Matemati\v{c}eskie zametki},
     pages = {42--58},
     publisher = {mathdoc},
     volume = {49},
     number = {6},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1991_49_6_a5/}
}