@article{DE_1997_33_3_a3,
     author = {A. Ya. Dorogovtsev and T. A. Petrova},
     title = {Bounded and periodic solutions of the {Riccati} operator equation with an unbounded operator},
     journal = {Differencialʹnye uravneni\^a},
     pages = {309--315},
     publisher = {mathdoc},
     volume = {33},
     number = {3},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1997_33_3_a3/}
}