@article{FAA_1973_7_3_a3,
     author = {M. G. Krein},
     title = {A hypothesis of {A.} {M.} {Lyapunov}},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {45--54},
     publisher = {mathdoc},
     volume = {7},
     number = {3},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1973_7_3_a3/}
}