@article{DAN_1988_298_4_a6,
     author = {I. M. Krichever},
     title = {A periodic problem for the {Kadomtsev{\textendash}Petviashvili} equation},
     journal = {Doklady Akademii Nauk},
     pages = {802--807},
     year = {1988},
     volume = {298},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1988_298_4_a6/}
}