@article{DAN_1992_322_3_a6,
     author = {V. B. Larin},
     title = {Construction of a nonnegative-definite solution of a {Lyapunov}},
     journal = {Doklady Akademii Nauk},
     pages = {469--471},
     publisher = {mathdoc},
     volume = {322},
     number = {3},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1992_322_3_a6/}
}