@article{DE_1981_17_2_a9,
     author = {R. Kh. Galeev},
     title = {Multidimensional linear passive systems in {Hilbert} space},
     journal = {Differencialʹnye uravneni\^a},
     pages = {278--285},
     publisher = {mathdoc},
     volume = {17},
     number = {2},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1981_17_2_a9/}
}