@article{MZM_1995_58_5_a14,
     author = {I. A. Sheipak},
     title = {The eigenfunction system of a~hydrodynamical problem is a {Riesz} basis},
     journal = {Matemati\v{c}eskie zametki},
     pages = {790--793},
     publisher = {mathdoc},
     volume = {58},
     number = {5},
     year = {1995},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1995_58_5_a14/}
}