@article{TSP_2009_27_27_a7,
     author = {V. V. Palin},
     title = {Solvability of matrix {Riccati} equations},
     journal = {Trudy Seminara im. I.G. Petrovskogo},
     pages = {276--295},
     publisher = {mathdoc},
     volume = {27},
     number = {27},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TSP_2009_27_27_a7/}
}