@article{DE_1994_30_5_a20,
     author = {S. V. Zhestkov},
     title = {On the convergence property for linear normal periodic partial differential systems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {902--904},
     publisher = {mathdoc},
     volume = {30},
     number = {5},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1994_30_5_a20/}
}