TY - JOUR AU - V. V. Palin TI - Solvability of matrix Riccati equations JO - Trudy Seminara im. I.G. Petrovskogo PY - 2009 SP - 276 EP - 295 VL - 27 IS - 27 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TSP_2009_27_27_a7/ LA - ru ID - TSP_2009_27_27_a7 ER -