@article{DAN_1997_354_1_a7,
     author = {D. F. Abzalilov and N. B. Il'inskii},
     title = {On an extremal problem of the flow of an ideal incompressible},
     journal = {Doklady Akademii Nauk},
     pages = {43--46},
     publisher = {mathdoc},
     volume = {354},
     number = {1},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1997_354_1_a7/}
}