@article{DE_2006_42_2_a13,
     author = {G. A. Sviridyuk and A. A. Zamyshlyaeva},
     title = {The phase spaces of a class of linear higher-order {Sobolev} type equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {252--260},
     publisher = {mathdoc},
     volume = {42},
     number = {2},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2006_42_2_a13/}
}